Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e0e6c4bd01d880…

MALICIOUS

PDF

111.5 KB Created: 2021-02-24 00:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 53a1a55d5e751c8eeb961d9d753a59b1 SHA-1: b0a1ee11f55f50bf7ebe319110ce60d69f04988d SHA-256: a6e0e6c4bd01d8806b0bf4fff7221bf64d4c2d5cdc8f68f04aab2752c81b826d
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/wix?keyword=samurai+warrior+armor PDF link annotation
    • https://tonuvufew.weebly.com/uploads/1/3/1/4/131438708/1fc03bd.pdfIn PDF document text
    • https://sarutofujatazix.weebly.com/uploads/1/3/4/5/134584212/9425390.pdfIn PDF document text
    • http://pet-guru.shop/dufororajolaxenepus59id.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_601886c32cd0e.pdfIn PDF document text
    • http://kellys.space/free_template_for_contractor_agreementcpd2m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5ffa64c841393.pdfIn PDF document text
    • https://penukigoguni.weebly.com/uploads/1/3/1/6/131606127/jodufupoma-xubigozuxukan-desalanugisig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_600d70ed41f3d.pdfIn PDF document text
    • https://xugojegisonixen.weebly.com/uploads/1/3/4/6/134684264/wipata.pdfIn PDF document text
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/455ab8542123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_601e2f10e7bc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_6028edfe88f7e.pdfIn PDF document text
    • http://nesobaka7.xyz/pull_him_out_game_play_online6ih91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuzoniwetavo.rf.gd/nunamiwaxiguwome.pdfIn PDF document text
    • http://lofadezowudekeg.epizy.com/album_songs_free_video.pdfIn PDF document text
    • http://xafexepov.epizy.com/90104311658.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_off000119c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C5 31904 bytes
SHA-256: 3d195381049911b72e0856c0402740ccc73d9d546734eef33c3acf2fb61ece1a
font_01_sfnt_off00017c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C23 4816 bytes
SHA-256: 0dd15b859802180aa3b6bb404a654bbce638116153e09699be5242364620e5e4
font_02_sfnt_off00018c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C79 10492 bytes
SHA-256: 11383937e8875979b9230f11553fa2c0d4700670a73dc9b88ae7e705dfb3a240

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