Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f1d062546bb947…

MALICIOUS

PDF

74.7 KB Created: 2020-12-25 02:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: d1877bd00949eaffc4b889a8d0e0683d SHA-1: d6a9024baf62fb75cac1951b5aec80bd9a7bcbf4 SHA-256: f9f1d062546bb9473b32f48686953c1376c2139aeb01b7042e1691a9a4804e97
254 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
  • 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://traffine.ru/wb?keyword=skate%20dice%20app%20android In PDF document text
    • https://gedolumu.weebly.com/uploads/1/3/4/7/134761272/1851459.pdfIn PDF document text
    • https://cdn.sqhk.co/vekasurox/kiajejh/59813044913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500667/normal_5fdaefeabd2cf.pdfIn PDF document text
    • https://roxuvipiga.weebly.com/uploads/1/3/4/6/134637137/vuwukapasizat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_5f95c2a1a6440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453328/normal_5fb25e515219f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5fab2f8e486bb.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/b4b42cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_5fba22f6d83a6.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/sokurinom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_5fd9e40476394.pdfIn PDF document text
    • https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/pakizetumopukasul.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/TjjVtic/binizituwalokagusetowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475875/normal_5fbb0a0fc5137.pdfIn PDF document text
    • https://cdn.sqhk.co/lodoseduler/RZFE6MC/eso_death_knight_leveling_build.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_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 5024 bytes
SHA-256: fbcf8bf18a2c1d85596ef1f1bd6539abbe71bf04ca1fa0ebd3252c963bdff8b1
font_01_sfnt_off0000f84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 11128 bytes
SHA-256: f39b289563e36386f1136fd7d68e3685f26d7cb422fb1f0674577a68babe5476

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