Malicious PDF — malware analysis report

Static analysis result for SHA-256 d122f2483d192099…

MALICIOUS

PDF

119.6 KB Created: 2021-03-19 06:19:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cb8e659b5d72d1ae9e26883826cb25fe SHA-1: 59a5d82d41a81c9beb4eb4c5ee8a420d4663fb03 SHA-256: d122f2483d1920997c53aa588d4d149096564e935cffb377dcc141e5d7fa31f6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9999

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 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://jacksth.ru/wix?keyword=pathfinder+shaman+handbook PDF link annotation
    • http://kojazunupetip.mygamesonline.org/is_saying_fine_rude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485705/normal_5fea0338285f3.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/gjBidhg/beat_stomper_music_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482191/normal_604ed2cdf05ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_6032fdaed8504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_602da2a874ec0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_6041d8d083318.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/50167750291.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/2480043185gk5a2.pdfIn PDF document text
    • https://cdn.sqhk.co/motakolilo/dtyjgjh/gadumiwatemukeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_6018afd8da490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5ff7136517e0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490263/normal_5fd877955b8a7.pdfIn PDF document text
    • http://erogancolumbia.site/wukubekuvuragunejunodidkrlf5.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/57498798394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_5feaf2033a258.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/sivesoxenelokafokimato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_5fd648263c8b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_604f040b011e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mobukug.myartsonline.com/jizukafexazutaxezafu.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_off00019a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A2F 5320 bytes
SHA-256: e92baeab64da0ad44835217abf8c7984346965767a1abe1aa8b6e50034a23086
font_01_sfnt_off0001ac19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC19 10820 bytes
SHA-256: 3d1ea82935a0a6fee566250ba2131ce7fc065f68ff94216f52da007b9f40adfb

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