Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc808f4e73da82f5…

MALICIOUS

PDF

74.0 KB Created: 2021-03-20 22:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 250686b2f5b16748d8c8a8ce7d0e9330 SHA-1: 5c521c2a1b7c50fce11d6018b96e63cc596eca2a SHA-256: fc808f4e73da82f5f5d518016760e58eac1e3fd5ee442358dadfa19abe288b6a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, with one specifically pointing to `https://golowaki.ru/award?keyword=ansell+solvex+37+175+pdf`, suggesting a phishing or credential harvesting attempt. The PDF structure and the presence of external links are indicative of a spearphishing attachment, likely designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://golowaki.ru/award?keyword=ansell+solvex+37+175+pdf PDF link annotation
    • https://cdn.sqhk.co/gavonenegave/2a5ghEK/hills_of_steel_2_wiki.pdfIn PDF document text
    • https://nanexore.weebly.com/uploads/1/3/5/3/135351495/kinuwijuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/pnijgcR/7030547927.pdfIn PDF document text
    • https://gefatute.weebly.com/uploads/1/3/5/3/135345711/5126903.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/lepevep.pdfIn PDF document text
    • https://xevupuwikuguv.weebly.com/uploads/1/3/0/8/130814145/xofevitezujil.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/ijjaJjj/best_action_tv_series_2020_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/ddfhabe/massachusetts_police_officer_medical_exam.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/jMkidb8/cashless_economy_essay.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/7cf1bb6b-0ac5-42d3-847f-9bc0bd7f5d73/jawozopuxarakawogesuj.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_91e0cea5ba0e4d13ad38ecb777d745ed.pdf?index=trueIn PDF document text
    • http://mevomum.epizy.com/vizimowakifafano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1396c28-be64-432e-a02d-a8a6655f3e1d/revovufitinemilajanig.pdfIn PDF document text
    • http://vixezazemezox.epizy.com/advantages_and_disadvantages_of_nuclear_family.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7525d56-12b0-4648-bc72-915aba090ded/barn_burning_faulkner_themes.pdfIn PDF document text
    • http://kinipojip.rf.gd/12020695159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16680bd-c529-45f6-851b-51a113f79f45/vowavojanumosiv.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/tinikijetipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f5c966-4f8d-41da-9b28-e2aba5b1c3a5/how_to_fix_call_forwarding_on_samsung.pdfIn PDF document text
    • http://fobadosox.epizy.com/abstract_and_concrete_nouns_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/kali_linux_nethunter_for_android_no_root.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_252882e4b78440cf82eeeecb16737329.pdf?index=trueIn PDF document text
    • http://xerekexaxo.epizy.com/aushadhi_vanaspati_project_in_marathi.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_off0000e1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EB 5264 bytes
SHA-256: 8df8f971772bb213d6912c0b44a53e613dac0a53d4ee9333134e5e1aa5bf47ab
font_01_sfnt_off0000f40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 11064 bytes
SHA-256: fcdb013988a36a36df34cbfbfb1f19aa91f153c466df51d83a9e95243d20a61b