Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d2809748efd632…

MALICIOUS

PDF

85.0 KB Created: 2021-05-18 02:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d80265244ed6c30e391ecfeb319b19c SHA-1: dadaaefb484b758fb9f1a7ee4bbdababfbb4070b SHA-256: 00d2809748efd63234c248051dcaf0bd742cbc4054f9f7a3db0d0b193de0226b
186 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 0.9994

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
  • 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.
  • 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://dafemum.ru/strik?utm_term=annual+leave+form+template+south+africa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382407/normal_6064768c178a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_6028907944090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502870/normal_5fd95df9dde8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_5fe91d49059af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_600cb3e34d8e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_606e2e9144f53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_60170141749d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fc5a8ce4c031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_6058ba5f77dd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_60226d6333fc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414169/normal_5ff204f3ca49b.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/nizevabibuda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467318/normal_5ff1b7ac3a092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488323/normal_5fec485ec8005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448733/normal_5fe768b7f12cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_602c5d765640b.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/bulelitazolize_furop_movofetaworud_lodefokovebini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_601789abb1f59.pdfIn PDF document text
    • https://natevotid.weebly.com/uploads/1/3/4/7/134773148/japuvenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422879/normal_600ef4a7c924d.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/3f963ad7ec39bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sinipuxi.epizy.com/zibisetedugawopavenopo.pdfIn PDF document text
    • http://bubomixutiw.rf.gd/sapilavarowadob.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFA 5304 bytes
SHA-256: c944d5fe955af2612417a03ec10b31e793020c6a0a652d356c3fa9372120a92d
font_01_sfnt_off00011ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE6 11124 bytes
SHA-256: d7915bc61f8cae3cdb58f88a8ad8efb6deedcaf2061a8f014399b5b4553ecf9e

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