Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab91f85970d8568…

MALICIOUS

PDF

71.7 KB Created: 2021-02-19 09:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d9b10944c8e7195ae407e68c5078f93c SHA-1: 70b0a5ed0de9fc3ede80e46eb49bb60192aa63b1 SHA-256: 8ab91f85970d856803e306f976e95726dd60f6acf2db08efff1d480fa8ae57bf
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to a 'furniture outlet closing', suggesting a lure. The presence of numerous external URIs, many hosted on disposable domains, further supports the malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/wix?keyword=morgantown+pa+furniture+outlet+closing PDF link annotation
    • https://cdn.sqhk.co/kasavakujosi/ghhjifO/2997240732.pdfIn PDF document text
    • http://steh-sistem.ru/682231564342u0xp.pdfIn PDF document text
    • http://specrazreshenie.com/prisms_and_cylinders_surface_area_worksheetl0wlo.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/WCMgiRZ/hattrick_movie_download_480p.pdfIn PDF document text
    • http://izzzaaa.space/follicular_lymphoma_treatment_guidelines_2018d4kmq.pdfIn PDF document text
    • http://limaxinsto.xyz/wosavuwujifls1.pdfIn PDF document text
    • http://clobuss.ru/diamond_pool_table_pocket_size7hrfu.pdfIn PDF document text
    • http://car-test.pro/block_craft_mod_apk_unlimited_blocksugqt4.pdfIn PDF document text
    • http://vengriya.space/instagram_video_views_app_androidxlugc.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/jgic2Ic/photo_video_editor_with_song_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/gutipefu/h2A99Lu/25464031172.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/iiighgU/veluwi.pdfIn PDF document text
    • http://euroshopmn.space/adb_root_android_6._0._11gfxn.pdfIn PDF document text
    • http://small-italy.space/zedenulozopd0fx.pdfIn PDF document text
    • http://about-fb-support.com/76114064466ozuyf.pdfIn PDF document text
    • http://euroshopme.site/falsifying_time_sheets_massachusettsx5js8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/68491961406.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/how_to_get_married_in_india_for_foreigners.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/futuzotupewipadulutugogos.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_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 5280 bytes
SHA-256: 0004695ea5fa9035a7a2e74492a98a8c5b275ce676e43c73ab1378837e3d20a6
font_01_sfnt_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 10548 bytes
SHA-256: bcec82f0f6e9dfdeefcbf61636ff0139f9cc247bea65ced68323c2e554d987d7

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