Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e60dc555fa27571…

MALICIOUS

PDF

93.7 KB Created: 2021-09-04 04:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c5f4de9ad3524dc8b81c12cbd0fab6e5 SHA-1: f24ce473357ceb1b2b3e664d5d7e46aaf13844eb SHA-256: 7e60dc555fa2757147f584f8843381b456e1f20b70779ac24b55e7a4062519fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://elijahlaurabishopblack.com/clients/b/be/bed082b287f5bb70db4763ab929fc18a/File/31697601060.pdf In PDF document text
    • http://positiveforce.in/uploads/files/65429218121.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f72683e83---kepejuxakijurimawuperores.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/25888432619.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/rozifibowakasos.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/7e156608e4a0505faed6d9f8cbee63ff/fomedubeminurifetabiwidod.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/29269603257.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d76e33003f6---loxovumokux.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/vumopo.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609852f6271b3---jobeziziwegemejukonati.pdfIn PDF document text
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/83077104167.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a921e6672---72688225955.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3f720b677---14786808580.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608720ac876aa---sebemuferowojuri.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/53190536844.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/mitawagimijedu.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-5/20210705232748645153.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/42201129656.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/292fbea45473fc546e15416539112b6c/94170254619.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/11160838288.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/4e9bdc0aa28f3e84672401960d3f1958/dexanedukujan.pdfIn PDF document text
    • https://network-italia.it/file/2762478918.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/80789953626.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/fakijilijotamefuwut.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/68177557659.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/kebajesoku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=chemistry+class+11+chapter+1+pdfPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A0 17848 bytes
SHA-256: 186671ad1ee76eab29963c8325adee646c529773809d03a1fce55cffd9c4adea
font_01_sfnt_off00013796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAD 10860 bytes
SHA-256: 905370ceb362cd6be4ec8fb22abdcccda69bb6830691b2d11a23b5248ccb8a4d

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