Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6cd709acc2a705…

MALICIOUS

PDF

194.4 KB Created: 2021-07-01 12:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6679cc29dc595b2bdf7878d7734fb55b SHA-1: 02dece62d0240a65bb1183cb3ec6932219fb7558 SHA-256: 1a6cd709acc2a705cb4fb6f3201610d02de58c62edf059bf1cc592c1ab43a6af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The file contains a link farm pointing to numerous disposable or compromised domains, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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 https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/iim8fp3j4bdgj3lpsm19ph4n2j/86779605952.pdf In PDF document text
    • http://adria-ex.com/images/blog//file/51748370778.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/87339596527.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b14cd5c9a---tireku.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/93503958917.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/vasiferinaviwenogiwukikiz.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/lofepon.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/e85d8d5a4e4a0f909621c4cb880c3e44/47484308465.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/8413378413.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6781c9cd48---gakusi.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc83b598b---polopawewelebof.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093214f858e6---25503189555.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c001b9a045---50832242967.pdfIn PDF document text
    • https://mimpishio2bet.net/contents//files/senimotuleruzewudefibig.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/44da2b3c192b7e789ebb2908efb79f84/mumigixemeledu.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/29062432133.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9ae33a6ed---78045343248.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf69347258b---23109558950.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/zaguxuj.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/ko0cmhlu2qre5aboik0co88p8h/pekemolatojamenememomupi.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/gekaltgs93igm4sf81mekm7f3d/90735431698.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7f135dde346583f1a63c3e8693014744/womewafitepe.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/90017061607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=nickelback+far+away+meaningPDF 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_off00029b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29B81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002b393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B393 18336 bytes
SHA-256: aa9bc7a9200ed3a4e7c8336648b34305440cfffd99f03515c21510c1714a972b
font_02_sfnt_off0002e351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E351 10700 bytes
SHA-256: 100017d718c53d3f7bdc1b901d00a9ed71e73e702053d4e43b01e8849dfb0201

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