Malicious PDF — malware analysis report

Static analysis result for SHA-256 656bfd4e69fa0201…

MALICIOUS

PDF

62.9 KB Created: 2020-11-10 17:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 28d8571b4560e95484ef000e028fe15c SHA-1: f30a734d50c3fe1115c86c6d79a2abdf28d4be13 SHA-256: 656bfd4e69fa020179680b2f6b5c094127dfa57de96fc609d00be485fc71071c
254 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
  • 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 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.
  • 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://gettraff.ru/123?keyword=netgear+ac1600+wifi+cable+modem+router+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f87a62365bf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_5faa7dfba1a37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_5f9fb9c0cac8b.pdfIn PDF document text
    • https://pujawuto.weebly.com/uploads/1/3/4/5/134588096/lakofopiwurulo.pdfIn PDF document text
    • https://jugizefabugej.weebly.com/uploads/1/3/4/3/134377355/0f32f6199804.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/sometevifum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f87a06c50e02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/852c573c-67d0-4632-9d90-7ed4ead6a181/kawaporufifivazowu.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/scholarship_recommendation_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea26a30-639f-4bed-9a52-e733c7c08a1e/xb_xa_yb_ya.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/35850964081.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/80864599084.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tosiditeb.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/artigo_meio_ambiente_e_sustentabilidade.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_off0000ae88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE88 3396 bytes
SHA-256: 76b1fe235f9fb9b840d631dd0a6bab68832ab9d4fb988a45ff4ca523553c43a9
font_01_sfnt_off0000bab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB6 5712 bytes
SHA-256: 34afb0994c921a55a81045e875cca5c691ed20939fa8b9ce631c588a7cf9cdb1
font_02_sfnt_off0000ce31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE31 9328 bytes
SHA-256: b5939f42e3047b57bff0f04846723302a1153efa9bb5e42b946b366d8abe268b

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