Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba53d554dfcedb1c…

MALICIOUS

PDF

71.5 KB Created: 2020-12-24 23:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cd6965f02ac53d7b2f95cd87d87921b1 SHA-1: b39c4f65c6b15097380b5ce8a40f5373f9085327 SHA-256: ba53d554dfcedb1ce1b8ffb360b65bf9bfd8045ac451d8525b7a95ced73acef1
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 0.9997

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://trafffe.ru/123?utm_term=lakota+medicine+wheel+for+sale PDF link annotation
    • https://cdn.sqhk.co/xizowabik/ifnifpB/smash_gamecube_controller_restock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464072/normal_5fa9ab0421fac.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/ce55f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_5f98a8108140a.pdfIn PDF document text
    • https://pexikonafan.weebly.com/uploads/1/3/4/3/134351575/bf66259834bb.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/Ojbhhhi/wild_west_redemption_gunfighter_shooting_game.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/jesidofefe/rusulilanutenawogase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0867809f-75bb-48a5-82f9-71b19704a7c1/tojogogezomuwovew.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/81639244611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfda28b-4969-43bd-a268-093ad5ce9567/treasure_map_hungry_shark_evolution.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/article_370_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261127ec-80e9-485a-a271-b6b45c414ddf/zigorefu.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/jikapobukasitobejenekasi.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_off0000db18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB18 5356 bytes
SHA-256: 15bd9e8695de3ca80167240db2e9fb8a5c6168d462b3f024d5700f09e5c0365b
font_01_sfnt_off0000ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 10608 bytes
SHA-256: c6e7d1bd1d0f5af953be75fbe1ee5c6fcc57f5ccd31ef679c9e15f5a14381382

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