Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2407482ab322643…

MALICIOUS

PDF

79.7 KB Created: 2021-09-17 14:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d768da7e35fd66d36afdff686916d411 SHA-1: ea4c60704b5dc24b5c7d8b12a308baefca7649a9 SHA-256: d2407482ab32264392a31b460ec376a41e36593b6828c8e0c8cb95246b987faf
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The PDF contains numerous links to external PDFs hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be instructing users to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=how+to+on+safe+mode+in+android PDF link annotation
    • http://ateliergermain.net/sites/default/files/file/nimoganilivonon.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/77230834448.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20219131251174061.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/nirativo.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/32597326268.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/a1790e78a5dc0fbb04df16b860a5fa02/fibemomazij.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/90012337827.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/40306276758.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/welomow.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109020814251960.pdfIn PDF document text
    • http://tano-cable.com/d/files/nixodumijimalinesig.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///sokuzixusadupajuruto.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/68613076718.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/turilefako.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/waripamida.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210902191015.pdfIn PDF document text
    • http://bio86.fr/userfiles/fichiers/27251086557.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/94263724002.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/kojobejavasoru.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/89499210591.pdfIn PDF document text
    • http://hanauhrova.cz/files/44839851540.pdfIn PDF document text
    • http://fxmeat.com/upload/file/9f6778243d2aadd0da74f61b6483d7c7.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304bf91bc72---duduwabazobozew.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A0 17428 bytes
SHA-256: 27c241f433a48b0ac1ab783737ed8fd66a6c4ed8bc5a0a3c9772cd6b4e319b6d
font_01_sfnt_off0001018b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A2 10544 bytes
SHA-256: 976142e407c7d277915dd3909b4d8427be43703854ab3985527a6dfaf8d60631

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