Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f94725cb444471…

MALICIOUS

PDF

80.1 KB Created: 2021-05-08 04:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0a00c998553f8f9fa8132e7be147ed97 SHA-1: 7dc5c857c90eafab45c110a5ddf6d19a27bf05c9 SHA-256: d0f94725cb444471b76bdd64bb789c494f14b477cfde2940a76d2c3f94a649a6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high ML classifier score indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely for phishing or malware distribution. The presence of external URIs and the overall structure strongly indicate a phishing attempt disguised as a Facebook help query.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=how+do+i+contact+facebook+to+report+a+problem PDF link annotation
    • https://cdn.sqhk.co/bajipugotox/icQigi6/faxupatokefixo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378386/normal_5ff099b9cabef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424341/normal_601137b91e060.pdfIn PDF document text
    • http://masajsalonunuz.com/20993870205hf7kq.pdfIn PDF document text
    • http://okrasote.info/rujiviise4.pdfIn PDF document text
    • http://idealica-italy.site/63969468670quqh6.pdfIn PDF document text
    • http://burrrhey.tech/80909818659iolg6.pdfIn PDF document text
    • http://creditscoreusa.info/how_to_use_first_aid_step_1ecx2r.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/9nw3jgO/febesotikoz.pdfIn PDF document text
    • http://goldenframecollision.com/digapiponegolidadixamumap28cue.pdfIn PDF document text
    • http://moneymaya.site/what_is_cognitive_development_theory72dsf.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://puruzil.iblogger.org/17341300137.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5fe11828503bb.pdfIn PDF document text
    • http://cardioactiveufficiale.site/controlled_experiment_practice_worksheet4hmuc.pdfIn PDF document text
    • http://forecast.bet/brain_gym_exercises_free_26_movements2cxqm.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/ghdjjbk/horde_defense_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigizakeku/4x5ggPJ/kpop_music_videos_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_60368da938751.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/jTibict/national_championship_games_football_clemson.pdfIn PDF document text
    • http://ludshop.xyz/yamaha_rx_v473_service_manualuamoy.pdfIn PDF document text
    • http://ig-about.net/femajifufafikarosoxevjdrn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://juzobezakugov.epizy.com/85906974322.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_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 5168 bytes
SHA-256: 7ab29407087d942cecbcd4bdfc713efa7acd90cb8d5e713304f518162be977b1
font_01_sfnt_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 10876 bytes
SHA-256: 6f1b8d1077c3c4dd25c8d4e93f7fb96a889886b57fabd3ee1aebb11f28dd6d7c
font_02_sfnt_off0001244f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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