Malicious PDF — malware analysis report

Static analysis result for SHA-256 58856efaa27d0836…

MALICIOUS

PDF

66.9 KB Created: 2021-03-04 04:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e40426786f13c6ad444751c961c8a977 SHA-1: 5a297ebf8acca269b8a4a96ddeef5be57ce6253d SHA-256: 58856efaa27d083635d8b8494b07b3c80fd8590645149bb96b2b69723b5a9ffd
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/123?utm_term=how+to+integrate+cos%255E4x+sin%255E2x PDF link annotation
    • https://cdn.sqhk.co/bepoweruga/hgfsejf/xovulodasejegigisul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487197/normal_60115f70d60dc.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/cbwbhcb/drastic_ds_emulator_pro_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416125/normal_5fe16006513c7.pdfIn PDF document text
    • http://mikrotikwizard.com/hibernate_framework_tutorial_for_beginners_with_examplescffub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384304/normal_6005acead9eb6.pdfIn PDF document text
    • http://ru-1.casa/11098272755enlwo.pdfIn PDF document text
    • https://bumozirejukije.weebly.com/uploads/1/3/5/3/135340746/vabewolovofukulo.pdfIn PDF document text
    • https://vejuxafesopekub.weebly.com/uploads/1/3/6/0/136010302/4985285.pdfIn PDF document text
    • https://dexekuweda.weebly.com/uploads/1/3/4/7/134705305/c5293e42d9.pdfIn PDF document text
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/xetotaraju-winazijobosaku-wupigokusawexa.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/j2Pgdfv/who_sings_the_song_my_lips_are_sealed.pdfIn PDF document text
    • https://kazilapematif.weebly.com/uploads/1/3/5/2/135293457/lukiv_fujunap_janurapabuma_vupewopexim.pdfIn PDF document text
    • https://kisuvali.weebly.com/uploads/1/3/1/1/131163683/romonikozapurisoreb.pdfIn PDF document text
    • https://zobovakobazazu.weebly.com/uploads/1/3/4/3/134319401/8331416.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_off0000c7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A1 5328 bytes
SHA-256: e1d55634f9d6778c069e75752fff605c9b871581a1d8029c6b67c24149574556
font_01_sfnt_off0000d9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F8 10712 bytes
SHA-256: 58d24fc2adacbb30ec12f6f12ff08f7e37190608398de5d6623d1032195347d1

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