Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c00a8144fdadcf…

MALICIOUS

PDF

63.1 KB Created: 2020-11-14 15:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8ef54c4b6c8106bd592dbe36cab4d7f8 SHA-1: 9de2ca3121066da082720e7ff05fd4eca13789d7 SHA-256: c7c00a8144fdadcfafe09dc483fc62e366e1852fda2a31d5b4b7ecbe6f7109d9
252 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, routes users through malicious redirector infrastructure 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 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/strik?utm_term=asme+bpvc+section+viii+pdf+free In PDF document text
    • https://jodotabamusunew.weebly.com/uploads/1/3/4/4/134402052/ziwedirobemu_xalozefugariwek_mewije_xiresopuxemar.pdfIn PDF document text
    • https://zirasave.weebly.com/uploads/1/3/4/0/134096010/9805133.pdfIn PDF document text
    • https://zebamejiwan.weebly.com/uploads/1/3/4/3/134312785/derezabozugoni.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/832302.pdfIn PDF document text
    • https://fisupipegapug.weebly.com/uploads/1/3/4/5/134515512/sotenovusa_nogibozenaredo_jejipa_zefomugil.pdfIn PDF document text
    • https://sezemizom.weebly.com/uploads/1/3/4/6/134622585/7eb128.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/sudamoraz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5fa7c31642234.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/vititobiwisib.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://uploads.strikinglycdn.com/files/9a22087f-b9d7-4286-8ed0-1389de86ce24/18779519613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77cb2f85-3012-454f-bded-c24249ec0a2f/zelorojose.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_off0000aea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA5 5036 bytes
SHA-256: da8a9166c37b404efd9b29609ff8c49f19dd06a1c3a90f3904447e3618d15808
font_01_sfnt_off0000bf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9A 9936 bytes
SHA-256: b4ce444eeeae209fca4c2fac43bfcaa51b960e4fcfade0a0cbca1469ca26bc15
font_02_sfnt_off0000e1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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