Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a928d4170ab30c…

MALICIOUS

PDF

78.2 KB Created: 2021-02-20 19:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 55fcd69255f639062b5bafc585b6fa80 SHA-1: bebe79eecf46e1c81ca9f1a9764f14335c9195bc SHA-256: e3a928d4170ab30cf0a13ef67c8d6ce41f4b2ae113202d73ba85dfc520f4afb1
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this malicious intent. The presence of a URL with 'google employee handbook' in the keyword further supports a social engineering pretext. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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/wix?keyword=google+employee+handbook PDF link annotation
    • http://citrus-fruit.space/tupevemevokebogixoj4gb03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411270/normal_600820cde5583.pdfIn PDF document text
    • http://znatural.space/34122144316xqtt6.pdfIn PDF document text
    • http://idealica-italiaofficial.site/61170744690turcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_6007b5835ceef.pdfIn PDF document text
    • https://rijevolokawuja.weebly.com/uploads/1/3/4/6/134661742/9576401.pdfIn PDF document text
    • https://topifovav.weebly.com/uploads/1/3/4/5/134595147/687c60f6ae3.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/defagokogose_vumazenum_vikosogaja.pdfIn PDF document text
    • http://siwevizinoguji.22web.org/liverpool_vs_genk_bleacher_report.pdfIn PDF document text
    • https://mazaxijav.weebly.com/uploads/1/3/4/4/134488449/5973811.pdfIn PDF document text
    • http://azorocheat6.xyz/62877529749eoyuh.pdfIn PDF document text
    • https://nenefifozotuve.weebly.com/uploads/1/3/0/8/130874038/5511038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408865/normal_5fee4bc5c6d65.pdfIn PDF document text
    • https://tekaxudifen.weebly.com/uploads/1/3/5/9/135992886/tiwosuwujozefujuzel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479673/normal_5ff8dd30015c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_602afe831f0e2.pdfIn PDF document text
    • http://topmassage.net/965655393737r0sb.pdfIn PDF document text
    • https://jerewerek.weebly.com/uploads/1/3/5/3/135349205/xabeno-patit-putiv-sowivojemivoniw.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/xoxuba_gikixi_sisubimew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bewexipobafuza.rf.gd/bad_boy_english_song_free_pagalworld.pdfIn PDF document text
    • http://sijopar.epizy.com/train_mod_for_minecraft.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_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 5436 bytes
SHA-256: 626d2ba28e89347d1d1ed6ca5b2d6c05b47295ae488b10d16fc714f7037c1f96
font_01_sfnt_off000108aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AA 10180 bytes
SHA-256: a9142e74d14816d4c619b8074bcc6286e00d0d95fba72ee3ccb41ebbfa08a927

Open this report in the interactive analyzer, or submit your own file for analysis.