Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b91a9a283c2c939…

MALICIOUS

PDF

71.5 KB Created: 2021-02-27 18:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cddc8e2d2daaae36aab53c6f32c1c35d SHA-1: e6f32e1baa5c9f51c53ce02821594d0afcc44d6e SHA-256: 3b91a9a283c2c93974b1d885c1614c87bf7def61122433637f818bd2f5f26c77
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=john+deere+gator+hpx+choke+cable PDF link annotation
    • https://cdn.sqhk.co/bewewojiwo/iibibgi/learn_spanish_teach_english_exchange.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/utk4jgz/best_last_minute_hotel_app_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/QkYibgG/tiger_shark_world_record_igfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5ff5aee94b15c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373264/normal_5ffacb54db2d8.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/eihRidA/sojumaxemiwado.pdfIn PDF document text
    • https://cdn.sqhk.co/milibotobov/UhbVBKl/zoragobozitabodemi.pdfIn PDF document text
    • http://midebozizigod.iblogger.org/rafoximulumejod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427287/normal_5ff19990df9dd.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/0ZRgixK/spacex_starship_interior_design.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_602c4fbb2ac34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413585/normal_5fff7857bb0ad.pdfIn PDF document text
    • http://prazdnikprosto.ru/ascites_in_catsypekm.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/p6Ojdhj/smashing_pumpkins_today_lyrics.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://vinixozu.rf.gd/elenco_codici_catastali_comuni_italiani.pdfIn PDF document text
    • http://wuzegez.epizy.com/big_data_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/beer_belly_or_pregnant_belly_answers.pdfIn PDF document text
    • http://sefakifag.epizy.com/vapuwadonivubuzavorusewo.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/49069559113.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/besosaresoregegiluline.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_off0000cdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAC 5160 bytes
SHA-256: 6dc325e04030719abddd485853b731c029213ea59176cf300b5268ebd878a887
font_01_sfnt_off0000df22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 10472 bytes
SHA-256: 7fa6187bd98495701706f4cc20367dfb3529437f591a8b7841d9d1b6204400bf
font_02_sfnt_off000102af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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