Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e061a290dbac0bb…

MALICIOUS

PDF

75.5 KB Created: 2020-12-11 21:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a80053d3ff545f638a555827adac3684 SHA-1: d8acb7f90f3ffbf7f466bb1417a2c950a387db2c SHA-256: 5e061a290dbac0bbb81f11839b945b9bcff5cbb8d2484cf2a73893423eaf6c0c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/strik?utm_term=lufia+ii+rise+of+the+sinistrals+ost PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5f9a73b8c4ea3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fcb667056a88.pdfIn PDF document text
    • https://rezivunafotete.weebly.com/uploads/1/3/4/3/134354631/peronuguba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5fa5f942de100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5fbad4436af97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/catia_v5_export_formats.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/kipafudadolonujuroxa.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/7599123555.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11a296b97992eb55d442c/t/5fc5497eeaf37e3b644abf45/1606764927105/piano_tiles_hack_apk_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6ba65147b148042bc07c/1606380457015/suguzeg.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/tegorokimomasisaditelop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ec1e3dfdd95b60d52fc9/t/5fc68f177acac6192aa71e29/1606848279240/galaxy_shooter_space_shooting_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77e28382bec7399f7cbaf/t/5fcbab98b495bd2028264248/1607183257107/fasir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcef86cc750a3b5a04d9a6/1606217606990/the_rise_and_fall_of_ecw_dailymotion.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/forakodu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AA 7692 bytes
SHA-256: acf1809f754470b09d476db91941ed4dc8c050ea83df3835f7b9e8344201fb23
font_01_sfnt_off0000eba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA8 4796 bytes
SHA-256: aaf57c1d4032627cc5f5b04b2b62e574d7d977e6924d517ac3d740817848ba88
font_02_sfnt_off0000fbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF4 10784 bytes
SHA-256: bb96d258636196cf1cebe616de223688e7266b8deaee1a34dd8ec9f86178c4e9

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