Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf312a755d70e75f…

MALICIOUS

PDF

79.3 KB Created: 2021-09-07 17:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f5d16e8252b75f515e1607e89377cc38 SHA-1: 4f246108195fc16225b687b1f7ea48ce9e68d3ee SHA-256: cf312a755d70e75f4d870efbaa4fc15e55bbccb0eef4261d9c5732d23bf7f2c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to external sites, some of which are hosted on compromised or disposable domains. This pattern is commonly used for phishing attacks or to redirect users to sites that host malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://scoutpate.com/userfiles/file/90963120965.pdf In PDF document text
    • http://forter.vn/hinhanh/file/xirunomokigezemuzamizex.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/53396395980.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/koposapidodomawiki.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/rapudamafokideseful.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161217c9ce5b13---94736769305.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/mudun.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/67919137487.pdfIn PDF document text
    • http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/66105507958.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97958543642.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/bc7a695fc3b81f26c49d184484f9c4f4/barunaxakugujanu.pdfIn PDF document text
    • https://duel.pl/userfiles/file/86336365564.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/mrsa6esna8rlc4firc30ojogeh/92968405115.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210702174159.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/pexagutoxuzavukumu.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/44b849bntt9k71699h9judip3j/gadizaxepasigufe.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles//file/sufateperawu.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffed3cc7b7---lawero.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/n6ag6qs19ig1601kiru2tt9ukg/82556922018.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c60db41932---zakimisejolelerolowene.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/45300663489.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163084790719.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b952d1e8f---56053477159.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16071671672e3a---damuzogokefubegemaza.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/tadesaxe.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/8c80e3111543f80d545b16e10ef71b41/sobogerilowukanu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=%D8%AF%D9%88%D8%B1%D8%A9+icdl+%D8%A8%D8%A7%D9%84%D8%B9%D8%B1%D8%A8%D9%8A+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8AB 15960 bytes
SHA-256: c61ce5b9abaf20f0151362fdaee9cd8ef2cd65b0edf5decb96506ef6068f8a16
font_01_sfnt_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 17848 bytes
SHA-256: 91c9563f85a18915bead29be5b17fcffbb3a66839b29e831f19dc0ccc0135be1
font_02_sfnt_off0000fcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF5 9632 bytes
SHA-256: 2a23708c7f95bda8020f6c425d3e5dee962546ef1006cd7a1a0866304613c060
font_03_sfnt_off000111c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C7 17576 bytes
SHA-256: a3029276b746fb7bb9aae20b9d4e3de2310d62f79771cffaaee0000f5aa9f68f

Open this report in the interactive analyzer, or submit your own file for analysis.