Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e716998b9b05137…

MALICIOUS

PDF

76.9 KB Created: 2021-05-30 05:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2d36aaaf892780c42853c200cc25de6b SHA-1: 88840c02223d8691ab1fb3d28d6ea47c4913353f SHA-256: 4e716998b9b05137b7d14de3ae87bd985d513b7dffda75af0bcdbba45d0a8a58
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 0.9998

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://seumenha.ru/123?utm_term=badrinath+movie+hd+video+songs+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487206/normal_6062500fd62ca.pdfIn PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/vufatikolu.pdfIn PDF document text
    • https://mavixozumag.weebly.com/uploads/1/3/4/8/134891478/af0aa467be93b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_6037977763116.pdfIn PDF document text
    • https://vazoxavaver.weebly.com/uploads/1/3/4/8/134863882/mirojagamukejut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_6011e447c5b5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412902/normal_5fed5d5c765a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_605701df2a876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_601abadbdec9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/94958731-da40-4a69-af39-db56c2dd5a13/the_daily_trading_coach_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284a11e0-81b7-4759-b584-f0573e406f7c/how_to_start_a_life_coaching_blog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a4b8c5-3261-4de9-996a-02c070deaea8/how_to_change_voicemail_on_landline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9589232a-a285-4a5b-afcb-01317e396297/fukarijelabavokudugew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec4173b-7740-4671-9744-10eee6cdc0da/38961170727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7c4d9e-542c-4af4-8f81-b52b009f77eb/56843983703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2652704f-fdf5-4474-9e75-c1b8ed89e709/92481688347.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_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 5396 bytes
SHA-256: b726a9126d4a72a3585e6c229a1312eb84bfaabdd05fff01f9b5246e0fbe9842
font_01_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 10944 bytes
SHA-256: abcb54a987329639353757c9bfa35993345c2b2654764774df26aaf39cc8b878

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