Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1bf384b237ce15…

MALICIOUS

PDF

74.2 KB Created: 2021-01-27 12:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7d5a1e5e3a2cbb80c758993aa9d418c7 SHA-1: 5a033d4f819980a096c9cb9080010f4694d29977 SHA-256: 6a1bf384b237ce15a92a74b90297d30f1a155833c626ec080d615098fd2db5b9
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=jump+cut+definition+example In PDF document text
    • http://flathead.us/77564520661a6kh1.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/pixojefowumimul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489429/normal_5fdff28d8be49.pdfIn PDF document text
    • http://xigujawuruwuko.22web.org/american_truck_simulator_v_1._30.pdfIn PDF document text
    • http://badgesverified.com/kim_cang_quyn_n7wpqo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_5fe90aff7bcac.pdfIn PDF document text
    • http://beach-fruit.fun/bodobogupasutizurezasenen7j2.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/hfFcrha/kinepepadewabuweta.pdfIn PDF document text
    • https://gezalimod.weebly.com/uploads/1/3/1/3/131379194/3556437.pdfIn PDF document text
    • http://daravto18.ru/helix_jump_ball_gamesf0lmb.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/fast_racing_neo_romiudsi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xegefonupekowa.epizy.com/pit_boss_user_manual.pdfIn PDF document text
    • http://nixuverojezuluz.epizy.com/14390889965.pdfIn PDF document text
    • http://xivegujox.epizy.com/portland_rmls_report.pdfIn PDF document text
    • http://pixutixiziv.epizy.com/comptia_server_sk0-_004_study_guide.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_off0000e502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE502 5084 bytes
SHA-256: 33b5bc5bec3f978724c5101406e89d3f1a266e88092ff52603653ccb3fc674dc
font_01_sfnt_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 11348 bytes
SHA-256: ebc1691d144884120bb246b8debe3107470822c88fd3bc06df9dd5bd54cfb64b