Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fd3783e96c6b22…

MALICIOUS

PDF

66.5 KB Created: 2020-12-21 14:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8115b2ee61fecc9bc9fa2abc309816d0 SHA-1: d1308a8455333d8fdceeb7777bfd157719ed6c86 SHA-256: 08fd3783e96c6b2235991dde88af215dc2c0f5fde3d8b2fd89864ae5791cbb0f
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://trafficel.ru/123?utm_term=la+gallina+colorada+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5fc126e7aee5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445735/normal_5fa54b8635dd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5fb36ab72ae09.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/runazoxo-tirufozovixob-xegidufotun-xokenenefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_5faa647843b0e.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/5867301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fdd2a692dcd53187f1e8c64/t/5fde1dc5f3f88b619f00faf0/1608392134198/bimimerawikukaxorujumow.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/31597963018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15df1e9fc3622d5255c20/t/5fc3d76fbc819f1cf44e8abd/1606670198050/mixegujofipob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc306df2e537a05ef16faf6/t/5fca203a41142a3c4b46bb5e/1607082044094/46130094430.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/yakuza_kiwami_2_cabaret_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd13e27dd1bd0a76251a17/1606226914266/vortex_sparc_ii_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b6e145a8629dca737e2/1606372207281/mathematical_olympiad_treasures.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf18e7b1d401545ae70bac/t/5fd0929d6cbf29106bffb036/1607504549711/free_music_maker_for_windows_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0012c12facd59cea80d2a/t/5fc5ca43eaf37e3b6464fed9/1606797892968/tai_chi_24_form_step_by_step.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7c89955c744b53b4369/t/5fc3978661e25426e1a655ac/1606653830965/uic_hospital_campus_map.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_off0000bc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC96 4676 bytes
SHA-256: 6b9c1bd8dc960f2b054fea687ff51f4b4587d1485ed94806fad7290ab021c291
font_01_sfnt_off0000cc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC75 10784 bytes
SHA-256: 8ce60fdd13f318f39e5ef9e8892826434bf1761beca7d8679c69628e4c971f88
font_02_sfnt_off0000ef6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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