Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5c55127da74a67…

MALICIOUS

PDF

181.8 KB Created: 2021-03-21 11:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4a3bf596e037291ce09fa5dd4db65324 SHA-1: d2e7950eb8480eb4a95ae13f5a83b581273add64 SHA-256: fe5c55127da74a67aa435e30eead828984a4b06fe0bc7fccee85af7718ac1fb5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The embedded URLs suggest an attempt to redirect users to potentially malicious sites for credential harvesting or further payload delivery. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://midufefew.ru/wix?keyword=saturn+transit+2020+aquarius PDF link annotation
    • https://cdn.sqhk.co/veludewozen/c30dgcb/free_back_pain_exercises_video.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/jJmwh3T/bumubitarifixeborar.pdfIn PDF document text
    • http://jakugurotugalow.22web.org/rivobuz.pdfIn PDF document text
    • http://steelsho3.club/the_professional_chef_10th_edition_p2x9fg.pdfIn PDF document text
    • https://wubiwadodeta.weebly.com/uploads/1/3/4/5/134577579/2b50f.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/mYgcMja/somusozifawagutu.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/iAhhs17/36127701749.pdfIn PDF document text
    • http://medtechnika1.ru/5054602594j5jqi.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/c22f3b4cabb6.pdfIn PDF document text
    • http://vujidiwasuxagi.22web.org/99350168990.pdfIn PDF document text
    • https://zepiwifolu.weebly.com/uploads/1/3/5/9/135965208/3dc9e93527485e.pdfIn PDF document text
    • http://tofabukusakuni.22web.org/lagu_alffy_rev_sea_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_07846517aff2436b82ec6284d25de06e.pdf?index=trueIn PDF document text
    • http://kuzebelinebofe.epizy.com/14988999269.pdfIn PDF document text
    • http://wuvopopimuwes.rf.gd/lezupuwugat.pdfIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_de50026fc6344db9932898fb418625b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad4a7fb-3342-4453-b4b9-6d26eddf061d/chemical_formula_of_binary_ionic_compounds_sheet_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae97028-4218-440b-b404-5da846aeb2f4/dell_poweredge_2950_server_memory_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b60ba4-dfb9-473d-8604-99786a9e2299/vocabulary_workshop_level_d_unit_3_answers_quizlet.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_89c6b91666104017bd8f7b2b5d11c02f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a513883a-dcab-4e58-abec-de7b41148e74/37897220495.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_29ead5c6d7d147b29ef4a59b410c66b8.pdf?index=trueIn 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_off00028fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28FC2 5152 bytes
SHA-256: 35cfc1d6a038a92137359b8f454fb1c20620a4ef1dde51ad041fc8185d081c1f
font_01_sfnt_off0002a151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A151 11240 bytes
SHA-256: ae51f2ee9ec15558b1cc21b86db9e816331c741c40cc8fbb05e47f28a90b2cf4