Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0edea285918fe46…

MALICIOUS

PDF

78.9 KB Created: 2021-03-16 17:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4930d7a57d13773daa2ba1ea9f4a6c8f SHA-1: 110e2c63b9068ee3887b35a7434d28cf5cbaa4d8 SHA-256: a0edea285918fe465e2446e8d02b84a458c9742b8a4281433cb602a67a4bc44a
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://pelibifir.ru/wix?keyword=summertime+saga+mod+apk+unlock+all+cookie+jar PDF link annotation
    • http://rirelavemug.iblogger.org/black_panther_marvel_wallpaper_for_android.pdfIn PDF document text
    • http://italywow.pro/76482000189ikgoe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_60150fcc07fac.pdfIn PDF document text
    • http://benevesegok.iblogger.org/bielle_manivelle_cours.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371809/normal_5fc7aad5d691b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_5fd95889dc532.pdfIn PDF document text
    • http://wordsideget.top/shark_simulator_2018xjbw4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konevimojo.epizy.com/robilosatosapirivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b89166-8ec2-4b68-ab55-876c24ea0a5c/doteworogamukumubufurod.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_eb21698e8af34280b0d8b7fc19f65806.pdf?index=trueIn PDF document text
    • http://guxajez.rf.gd/27406348227.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_30c83ecaad4640a6b16e55762803024a.pdf?index=trueIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_82e4b1bdb3844fb099f5252a0ebe5259.pdf?index=trueIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_75a39382bc0a48029dc08da2798683ef.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_80a4e721ab224a1795d7cdba0145c4b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb52f7c-3f6a-4b5e-8021-09432c89b708/fire_and_blood_book_illustrations.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_2b70aaad2e234cad94c76fc11c68ba15.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d2e6d3-63eb-43cb-82c9-99d8d0452c18/15052545156.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_69693f6ade964cbc8d5a36bb9a100966.pdf?index=trueIn 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_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 5636 bytes
SHA-256: e390bcf8d734f0d6d0ed6e694d07c3a0196fee3060e3e93470e4abc30a336775
font_01_sfnt_off000107ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107ED 10752 bytes
SHA-256: 15ffaae9f560f8b3c1fd43bb5e706dd03567c05c7fd60774dbeb455dc5d6a22a

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