Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf65eea8fbf260c…

MALICIOUS

PDF

79.8 KB Created: 2021-03-19 21:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5228a511a6f32db1d882bd15a12cf7ef SHA-1: f4008b301b12f62069760023058632327f03bc91 SHA-256: abf65eea8fbf260c7e7bb81f540d9d479ffeb6291f8a887b2b1930a4b7fc5137
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic of encrypting payloads to bypass gateway scanning, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kuzutuzo.ru/award?keyword=diameter+of+fetal+skull+pdf PDF link annotation
    • http://youtube-subscribes.com/kenmore_elite_washing_machine_drain_hose82ijm.pdfIn PDF document text
    • http://se-mrush.com/42870091092xf70r.pdfIn PDF document text
    • http://harkateine.fun/english_speaking_guide_tokyoy4djl.pdfIn PDF document text
    • http://sodahq.club/dokefubovgye6g.pdfIn PDF document text
    • http://airned.ru/schwinn_airdyne_pro_repairjd0ta.pdfIn PDF document text
    • http://euromarket.pro/royal_caribbean_alcohol_package_discount26p8d.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/DwQggh2/fosuvokokixug.pdfIn PDF document text
    • http://momentshop.space/5303519593547h4q.pdfIn PDF document text
    • https://cdn.sqhk.co/vumatoxikom/aQUiijd/drag_sim_2018_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomekurufe/1wp1Eha/gmail_app_password_recovery.pdfIn PDF document text
    • http://lavkavkusa.store/52477692936y5tta.pdfIn PDF document text
    • http://slamelina.website/500_essential_words_gre_vocabulary_flash_cardsu6pa0.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/c58cf01d-d704-495e-a822-e51f9938cf0e/zevuvexivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e9f9dbc-4149-4954-8ea9-0efc973df54a/sony_str-dh820_bluetooth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff999e15-ec56-41a8-bf9b-ba02bd446a33/how_much_does_tracker_cost_per_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84afaa51-fdd0-47bc-bcfd-42e8c2480d01/gediv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c09271-2654-43d8-8208-e2e1133811c4/3d_interior_design_software_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4a2502-8441-41ec-8b7d-d4a74a3356b2/90868837046.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08F 5248 bytes
SHA-256: 37503b1af1b32ae754813715b16bb69c412ca2e2754a330bf355d26fd07c6ceb
font_01_sfnt_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 13180 bytes
SHA-256: 6129487576d0164005179d4ae5297eaa0cc00901b5150707cca0d972eb8e91d1
font_02_sfnt_off00011d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4E 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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