Malicious PDF — malware analysis report

Static analysis result for SHA-256 658e6aa0e3ff88d4…

MALICIOUS

PDF

71.1 KB Created: 2021-02-13 01:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 012e7774325b00bb522e180febcb5c4a SHA-1: 907cc707b1129cf83d8f6fe4b12d5fe44a906be6 SHA-256: 658e6aa0e3ff88d40793577ffca728f379022db0900f6aa0451b2a85d720175a
196 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=ejemplo+de+diagrama+de+proceso+hombre+maquina PDF link annotation
    • http://zakunofukar.iblogger.org/10590358078.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/suwiruxevibi-dipinazagapan.pdfIn PDF document text
    • https://xofiguguja.weebly.com/uploads/1/3/2/7/132710561/timijorelujori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448547/normal_5fd6781f1a8a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471703/normal_6023e1fa6d45b.pdfIn PDF document text
    • https://bixikobitil.weebly.com/uploads/1/3/4/5/134525497/1209981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_5fd664e7916a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390659/normal_5fe396b016afe.pdfIn PDF document text
    • https://rixedevo.weebly.com/uploads/1/3/5/3/135306589/52fa412b325702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerakunutage.epizy.com/zevazufiferumidetezugixu.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/99690378256.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/labuwotubadobiwovasolu.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/kunukanujeperesitilejesa.pdfIn PDF document text
    • http://mizebowofaz.epizy.com/xonomovogupixusunodisi.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/nafaxibowigenuxasarexuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/zuzukaje.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/impossible_quiz_2_answers_12.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/83896624958.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/les_miserables_10th_anniversary_soundtrack.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_off0000d4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CA 5784 bytes
SHA-256: 06d1724906b3a23b057a5a6986fd591984ba77365070142bb7419606d6b2d4da
font_01_sfnt_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 11328 bytes
SHA-256: a9a96f591d5305c29db0d1d9482d5c28929abaae435f65bebe9950878fd86706

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