Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02ded0dedebc041…

MALICIOUS

PDF

80.0 KB Created: 2021-09-19 14:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bc015c89070c08dcc3b4a8877073a983 SHA-1: e1a518864a94e1378988e9b7fdf3a364d6ee8770 SHA-256: e02ded0dedebc0418f11e9a4522d357ebfc6846a214e48843c1dc4d2336de2d0
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to other PDF files hosted on a variety of domains, many of which appear to be disposable or low-reputation. This suggests a phishing or scam attempt where the user is lured to click through multiple links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bfr-bialapodlaska.pl/userfiles/file/siluxo.pdf In PDF document text
    • http://co-mit.com/uploads/files/fuzizegugomugovome.pdfIn PDF document text
    • http://01host.ru/userfiles/files/ranebojugajapesizuseg.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/tevumogawatujofuke.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/47966437486.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/76119509054.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/31808927361.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/bebifarum.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/27338785221.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/mofelulakedo.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/83368235811.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/91260509316.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/zijuvebu.pdfIn PDF document text
    • http://www.polni.si/Images/files/wefojenerifufedugo.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5814a96cb---waxepeleb.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/fae8e0b68b627711ac0f012b71fff746/77274453082.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/99559246612.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210910135816.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/51848157068.pdfIn PDF document text
    • http://xenangheli.vn/public/files/gowibovidugejudomip.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/gonadalukasesaxabuzire.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/guluwurakopikusu.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1631567405zuzepamapuliz.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/rigipadaduzora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=google+apps+for+android+wearPDF 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_off0000d4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CB 17608 bytes
SHA-256: e31f330a2fb0d22cf00815dbf27ad98e2c084c21afd1b2545531d2b2abcad0d7
font_01_sfnt_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A44 10700 bytes
SHA-256: b2d341b48ff8b88c6ceeeb6471c1461d1e5cc30880dd681c4c5ed7da59814d06

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