Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59adee8dfacbc1c…

MALICIOUS

PDF

98.0 KB Created: 2020-11-21 06:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2a8b8411400e3ce8568d9fd752198b25 SHA-1: 2fa4ead8d0598d20b75a18f2423d62ef4e16ed77 SHA-256: b59adee8dfacbc1c2081a4cd0e8552f6f28772d15dfec8c5f9a752c6f078c18e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, characteristic of a link farm or phishing attempt, with one primary URL being https://trafficel.ru/aws?utm_term=breast+cancer+ppt+templates+free. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it may leverage embedded JavaScript for malicious redirection or exploitation, aligning with T1059.007. The overall behavior indicates a phishing or spam distribution tactic, likely delivered as a spearphishing attachment (T1566.001).

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://trafficel.ru/aws?utm_term=breast+cancer+ppt+templates+free PDF link annotation
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/sifuwatodomenad.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/6696945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f8b77c856638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_5fad2309322a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5f92065eb79e9.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/365d7256-d0b7-413b-a461-d5ea94970608/89465425390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c181ffc-79d4-448a-beb4-551c2378d2bf/88266446863.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/wuji_the_untamed_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e3441a-0bb5-4ae0-b129-9786b793e1c9/juzosu.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/bupebovota.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/2018_calendar_lala_ramswaroop.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/east_west_optometry_conference_2020.pdfIn PDF document text
    • https://medlineplus.gov/breastcancer.htmlIn 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_off000142ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FF 5212 bytes
SHA-256: 08b139f5a4d956703f18a27e36fa14cc2ae8deb419ea2eb3f3d4ea0ece9c06e3
font_01_sfnt_off000154a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A5 11316 bytes
SHA-256: e72714810cdab8b53f9bfedf37de90fd498f77622d8591eadacebf59d5209220

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