Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7eeb62c808ec3c2…

MALICIOUS

PDF

93.1 KB Created: 2021-08-18 11:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7b24d5804a0e70e493dac779d31c7326 SHA-1: a09a599c8f4efabbfea06914c24f70307bc38285 SHA-256: f7eeb62c808ec3c262f17582a42385f024eaac8150542d92a21185acb41d2914
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 User Execution: Malicious File T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. The 'SE_CLICKFIX' heuristic indicates that the document likely employs social engineering tactics, instructing the user to press Win+R or paste a command into a terminal. This is a common method to bypass macro restrictions and execute a second-stage payload, likely downloaded from one of the numerous embedded URLs. The document body was unreadable, but the heuristics and URLs strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9629

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nomylo.ru/uplcv?utm_term=invisible+character+fortnite+2021 PDF link annotation
    • http://huiking.cn/uploads/file/271730279353.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/vifum.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/22915084395.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fefd517f2---voponixi.pdfIn PDF document text
    • https://ottopianos.nl/files/berimo.pdfIn PDF document text
    • https://whitesal.com/data/images/file/6776_20210607120548.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/32960183896.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1d3bce94c---fikisemujovusulevorowir.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb5a77d3c38---2099514722.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7049d01ba1---95007518020.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/436a2eb342a9a4b3d5505993f5523631/kuzifafa.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/75892355102.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608428cae0cff---lagilipa.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/a24475e5c094624fb2016339822b2824/pokovazonupe.pdfIn PDF document text
    • https://promise-land.com/upload/file/detusiwusexuramovez.pdfIn PDF document text
    • http://medrea.ru/upload/files/jimuner.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d6846e93a6---93407508815.pdfIn PDF document text
    • https://mollis.rs//files/93992887248.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a62857d97f---mabopokikoxodes.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ff0e66d0a0d---xosox.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c20618e94---94857918244.pdfIn PDF document text
    • http://cecev.com/stockages/files/32361167339.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b478a8402a3---lenivurul.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-6/20210506105519610442.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/ziwiturewivovumetaxosuxag.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdeb84a1a0---28316676616.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE6 21524 bytes
SHA-256: b0854947e4c1d86fccfd641012feba9e726c968ce76dc5050cbfb139fc36a242
font_01_sfnt_off000111b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B3 1636 bytes
SHA-256: e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500
font_02_sfnt_off0001197f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197F 17232 bytes
SHA-256: a341e2911c8de7e089c7d186f66a469bc03eea603af0273e52ad66481165179a
font_03_sfnt_off000132aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00014ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC1 10884 bytes
SHA-256: 77aaf27aa898dc059e2bd46237aef90650f88594cac77d72b4c210084178a933

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