Malicious PDF — malware analysis report

Static analysis result for SHA-256 2865638f20093efa…

MALICIOUS

PDF

93.9 KB Created: 2020-11-28 01:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7c8a856df42e4c57db92147a62e41e2b SHA-1: d98719e0f26f97ea72b5cea2dbf37bd4e1878cb6 SHA-256: 2865638f20093efa3d10748911df5ffc9fa68f37c85cf379f9dc948c192f6c32
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/123?utm_term=civ+4+mods+fall+from+heaven PDF link annotation
    • https://sirubiruxegame.weebly.com/uploads/1/3/4/5/134581195/fuxovotarifilugu.pdfIn PDF document text
    • https://boxomuti.weebly.com/uploads/1/3/4/0/134016719/waferifowixasu.pdfIn PDF document text
    • https://jakinamil.weebly.com/uploads/1/3/4/3/134391996/tavozigonin_zosikifamej.pdfIn PDF document text
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/1225122.pdfIn PDF document text
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/bosav.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/666c4a.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/e98d0b8113c68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409093/normal_5fb8c82657be6.pdfIn PDF document text
    • https://jurexufibemoso.weebly.com/uploads/1/3/4/3/134310147/9f7270d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5f961dedded82.pdfIn PDF document text
    • https://zozesikijep.weebly.com/uploads/1/3/4/5/134586683/vupixadan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/salosibejodod/kegunexuzutefivik.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/avg_antivirus_crack_2019_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9aabf3-4554-4312-819f-cfcf46bcf13b/sword_art_online_light_novel_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450c96da-b0fc-4dc2-a3a1-d5389c116e96/12286784319.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12575 5024 bytes
SHA-256: 2aace884a8aa24b3f8dc38d84902d7986297f5a281a9a5c2b7aefb0a04fb3931
font_01_sfnt_off00013663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13663 11264 bytes
SHA-256: 63300869d347b57f36086f28aaa37907c8cf1e5fbc597ba5d522fda6584d7d9e
font_02_sfnt_off00015ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CEB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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