Malicious PDF — malware analysis report

Static analysis result for SHA-256 070d31d5720f9bf7…

MALICIOUS

PDF

70.1 KB Created: 2021-02-16 01:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d68dfc7dee4f7104cd57700e2299b01f SHA-1: 44411308e7d4b72d6b60086e8b5bbbd0e0666386 SHA-256: 070d31d5720f9bf7efd03b14b8b4ac472eec20c899502eeb2f5b60825c4531ed
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 0.9998

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://bologen.ru/wix?keyword=human+sexuality+roger+hock+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5fce226f31631.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/hjgcjhT/35562384576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_600fa925d0592.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/Mn4iKig/dapewanikegol.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/J3Rvhaq/monster_hunter_stories_amiibo_amazon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5fcea2fb732f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_60199b43623a2.pdfIn PDF document text
    • https://tajewarupimef.weebly.com/uploads/1/3/2/6/132681391/10a91e.pdfIn PDF document text
    • https://zoxujaratufopa.weebly.com/uploads/1/3/5/3/135399722/7064475.pdfIn PDF document text
    • https://wapubepedud.weebly.com/uploads/1/3/1/4/131455956/lomixiguro.pdfIn PDF document text
    • https://dulipitigisol.weebly.com/uploads/1/3/4/7/134717891/475a8074.pdfIn PDF document text
    • https://mutikotamibe.weebly.com/uploads/1/3/0/8/130874320/wutaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5fd1a397528fc.pdfIn PDF document text
    • https://mopomavimixefor.weebly.com/uploads/1/3/1/1/131164117/37858b8ebfd0.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/jgjeich/23856089302.pdfIn PDF document text
    • https://dejegudiferu.weebly.com/uploads/1/3/1/8/131857494/nopazagawipinov_fenudomomijin_tarolojal_bisod.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/wapabefizosumi/brindisireport_cronaca_oggi_bancomat.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/17157968335.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_off0000d528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD528 5764 bytes
SHA-256: cce4bf5c2a6d95d886753b7e6e0cf862427f11dab8bdb3c8517ef3b3c374c860
font_01_sfnt_off0000e8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A4 10224 bytes
SHA-256: a15e19ec04b5188b65784bbd00997b94b2808e4aeedcbc0517200bda4f0ea9ed

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