Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9aae77af3c1c657…

MALICIOUS

PDF

71.7 KB Created: 2021-06-07 20:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 988ca281d4e7320579c4aada7700cb7b SHA-1: 4c1238ca481b15c6837c0c13c3eaaa388bc82733 SHA-256: e9aae77af3c1c657a316abd07b4f397a7890b06e138a0c72c231759c9c707ff1
186 Risk Score

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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pixomot.ru/pbw?utm_term=super+mario+flash+hack+code PDF link annotation
    • https://powagexufofuw.weebly.com/uploads/1/3/4/7/134748875/9094994.pdfIn PDF document text
    • https://genofegewad.weebly.com/uploads/1/3/0/7/130776157/3248437.pdfIn PDF document text
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/7841644.pdfIn PDF document text
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/gijukiwimog-vajovifab-fopovu.pdfIn PDF document text
    • https://fezivalolir.weebly.com/uploads/1/3/4/4/134461714/regepufenalemeb_wexifedipaf_venefubebev_fenubepip.pdfIn PDF document text
    • https://bazawafamojuw.weebly.com/uploads/1/3/4/5/134508147/24acc23d4914ac1.pdfIn PDF document text
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/7c05c58e550e449.pdfIn PDF document text
    • https://vozupixog.weebly.com/uploads/1/3/4/3/134312338/1521365.pdfIn PDF document text
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/menugazewev_tejiz_xovobexoxu_jisitosifuzoj.pdfIn PDF document text
    • https://zizopozuwugova.weebly.com/uploads/1/3/0/7/130775786/nurufez-korivuw-pigawe.pdfIn PDF document text
    • https://kijilijesudopob.weebly.com/uploads/1/3/0/7/130739968/6899340.pdfIn PDF document text
    • https://vatawasuri.weebly.com/uploads/1/3/3/9/133997312/sotikim.pdfIn PDF document text
    • https://pikimekexer.weebly.com/uploads/1/3/4/5/134587048/zelisisisafomab.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/4583110.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/70a9f9c8-4a31-432a-bfb4-259d2c2d6744/why_does_my_treadmill_says_lube_belt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7a790b-043f-4284-8597-9cc01c79eda5/vuvepamonaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e2350cf-fee8-448e-8463-5d0df2cf878d/kinozifofuxizapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6432956e-eb92-445b-83e9-35fbf9b8eae0/71022866520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b594e987-fe64-48b7-b5de-0155ff36c6a3/wopeboludavunevibo.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_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 5560 bytes
SHA-256: 7b410906452838fdf675e81a3af4faf651cb7ba90c8f4541e84cf83667cc57e3
font_01_sfnt_off0000ee91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE91 10360 bytes
SHA-256: 6d989cd57fd5abb9c4ef923cde0190ffec1e5ef9b57867bc0c7e004670355c0d