Malicious PDF — malware analysis report

Static analysis result for SHA-256 37fdef1041e76620…

MALICIOUS

PDF

70.9 KB Created: 2021-02-11 10:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 42b805058afd8de84ab312bdfb20d53a SHA-1: 93405bad72e94beb2adeb3962d03d4918916d8b1 SHA-256: 37fdef1041e76620c2090b73494f40d7fccc02d5e1871bc3757271e654c6e68e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://seumenha.ru/123?utm_term=d%2526d+travel+time+calculator PDF link annotation
    • https://cdn.sqhk.co/perikowep/Nghpgdf/jotim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_5fe61a6927bb9.pdfIn PDF document text
    • https://najabokaxosol.weebly.com/uploads/1/3/5/3/135300306/rebirajawizexof_romazasidedodiv_noxalor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376600/normal_5fed20894bed3.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/kejalukijem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_5fe70d1917cbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_601b230e223b5.pdfIn PDF document text
    • https://wovukevaz.weebly.com/uploads/1/3/4/5/134523328/wesanufiluwupexowugo.pdfIn PDF document text
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/vojabu_pagukesegol.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/iijLUij/how_to_draw_baby_yoda_eyes.pdfIn PDF document text
    • https://baxukeze.weebly.com/uploads/1/3/0/8/130874478/b38e6.pdfIn PDF document text
    • http://teachost.com/nike_run_club_app_apple_watch_series_1x1j32.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/vjhMgjK/beguguges.pdfIn PDF document text
    • http://christmas-gift.ru/widescreen_wallpapers_frees9dnk.pdfIn PDF document text
    • http://excschool.ru/bagel_pie_labs_smart_tape_measurejna0r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB1 4156 bytes
SHA-256: e28c3d75b71adbbf3e3f51f1fa20b85ae8a239f1e87d766e9236934b86ab0752
font_01_sfnt_off0000eadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADF 10572 bytes
SHA-256: bbac350d02bf6d8b753b46fe95475cbe7cf9f8691091b80c3dedea9da37955a9