Malicious PDF — malware analysis report

Static analysis result for SHA-256 323d5f086c025343…

MALICIOUS

PDF

87.0 KB Created: 2021-05-12 20:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 291d8392504b0f6aef8b7e243f674b95 SHA-1: db6be6fab99fc8e95b0f62c6034e8974e16ffdd4 SHA-256: 323d5f086c025343af6ad268833feabdd5b43a09448302ebe54ce7920cb4e5bb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating a phishing attempt. It contains a large number of external links, likely intended to direct users to malicious websites for credential harvesting or malware distribution. The embedded links suggest a link farm or SEO poisoning strategy to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=honda+express+for+sale+south+africa
    • https://cdn.sqhk.co/xugavizira/fgfhaRg/99817311256.pdf
    • https://cdn.sqhk.co/tarekekog/bugeMhh/globe_at_home_prepaid_wifi_antenna_review.pdf
    • http://wulutapebime.getenjoyment.net/lg_washer_service_manuals.pdf
    • https://cdn.sqhk.co/molavagew/ThgFifd/photo_effects_editor_online_pixlr.pdf
    • http://sikakapu.medianewsonline.com/55866178425.pdf
    • https://cdn.sqhk.co/molavagew/Chgjagf/fantasy_football_expert_fpl_draft.pdf
    • https://static.s123-cdn-static.com/uploads/4490266/normal_5ff84d97e72a6.pdf
    • https://cdn-cms.f-static.net/uploads/4462726/normal_60446a19ad9fb.pdf
    • https://cdn.sqhk.co/dovawowo/haibcI1/burnout_drift_seaport_max_hacked.pdf
    • http://vegofejolafud.mygamesonline.org/65516249922.pdf
    • https://cdn.sqhk.co/xenivoronizu/hiijTic/braided_wrap_rope_bracelet.pdf
    • https://cdn-cms.f-static.net/uploads/4484118/normal_6063b15bb60f2.pdf
    • https://cdn-cms.f-static.net/uploads/4405459/normal_60175c4b1da6e.pdf
    • https://cdn.sqhk.co/zirevazul/Vhcjhjf/kapaluwozipopunozinenov.pdf
    • https://cdn.sqhk.co/fezusife/ibBuJG0/celebrity_cruises_alaska_2021.pdf
    • http://dufifudusimube.mygamesonline.org/frases_celebres_de_la_novela_el_amor_en_los_tiempos_del_colera.pdf
    • https://cdn.sqhk.co/woberimi/HjiUheE/smart_watch_menards.pdf
    • https://cdn-cms.f-static.net/uploads/4467593/normal_603fdf1099ea9.pdf
    • https://cdn.sqhk.co/vasegodesazu/jhhbNgd/battlefront_2_ps4_player_base.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_b111c2b6c393470c9b850fe23d66b5e2.pdf?index=true
    • http://xukokumo.myartsonline.com/37819716820.pdf
    • https://b993c520-4fc9-488d-8dda-35d8b3dc2713.filesusr.com/ugd/6f5492_4a3a440e311f409aa7cc96fb6e779eb7.pdf?index=true
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_792a1b5debfd44c1a2233e368e270683.pdf?index=true
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_c9e4fc34d4f349e6b64acb6c0be45d9d.pdf?index=true
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_97b3e5c70a5548d2a0c50279829ce0b1.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011534.bin
1fea01e3023d379817a78b3502d7ff6cb480986cb346c3fd145dacdd8f95bde7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11534 5272 bytes
font_01_sfnt_off0001271a.bin
7d1e9b1104a04485e4ac3f9225f3b33c7bcdcbfa3a45fe47c81bb429fea2ce0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1271A 11008 bytes

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