Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e35a76836130fde…

MALICIOUS

PDF

73.0 KB Created: 2021-02-25 08:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3dd61809bf35b17dc034d14545abf90c SHA-1: f986c1ffc3ac93367be7704aabfabcb640dc1c24 SHA-256: 4e35a76836130fde8917ca36b2d6a19731c52dcf673847cd261a87d41a9e97df
186 Risk Score

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
  • 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://leonvi.ru/award?keyword=enter+your+product+key+microsoft+excel+2013+free PDF link annotation
    • https://cdn.sqhk.co/wolowivem/gcsiiG0/dancing_on_ice_contestants_2021_lineup.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/eCggifY/kik_app_not_working_on_wifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462362/normal_5fe6b583c30bf.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/tokyo_ghoul_release_date_anime.pdfIn PDF document text
    • https://cdn.sqhk.co/bavisimupux/hhgdIjj/lulapobipavin.pdfIn PDF document text
    • http://hotel-engels.ru/47958948053jtbvu.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/can_you_day_trade_stocks_on_robinhood.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/5HijjcB/fuxip.pdfIn PDF document text
    • http://winoraama.fun/xalowipewulcd88r.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/QGuKBhj/70617005509.pdfIn PDF document text
    • https://fokomawirofuteb.weebly.com/uploads/1/3/0/9/130969657/7721676.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/how_to_hook_up_sharper_image_wireless_headphones_to_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/high2ge/dokuliw.pdfIn PDF document text
    • https://vojawozusuv.weebly.com/uploads/1/3/1/1/131164351/nakeginofo.pdfIn PDF document text
    • https://zexexidiwe.weebly.com/uploads/1/3/5/3/135330220/fakamemuxunezafo.pdfIn PDF document text
    • https://sagelexuda.weebly.com/uploads/1/3/4/8/134882043/afcc020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duvodix.myartsonline.com/bostitch_floor_nailer_model_m111_manual.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_off0000df7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7B 5772 bytes
SHA-256: 6fe17afc9f06d43476ee0d214d226e5dde405ed02bea03f59b9da4f64d5d04bb
font_01_sfnt_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 10388 bytes
SHA-256: 09c9bae6bb14b9aabb1d3375357128688424ebcb9ac33cbdbf10b042de322b6b

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