Malicious PDF — malware analysis report

Static analysis result for SHA-256 0942cbdd0ae0737c…

MALICIOUS

PDF

74.1 KB Created: 2021-02-26 23:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5adf191ff1c3083689f321f4ed8e2d3f SHA-1: 191a2d4f02c7593c126eee29ea60620cf588b9bc SHA-256: 0942cbdd0ae0737c9dc4b4190b01636ed070e82a306a0f9a43e06798cea62e87
196 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.
  • 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://druttle.ru/wb?keyword=tm-ac1900%20default%20wifi%20password PDF link annotation
    • https://xiresipi.weebly.com/uploads/1/3/1/1/131164504/3394432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_6035ac7eba055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450624/normal_600faedae69fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378606/normal_60046e1e6ab4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445881/normal_60219258bb692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463272/normal_5feec041bd4a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454550/normal_6010d3f7584c8.pdfIn PDF document text
    • https://zuwiwenulabir.weebly.com/uploads/1/3/1/3/131381762/ganamitidezu-gajuxerusujiri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489032/normal_5fc8617812725.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/cjhkgi3/luvuburure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369491/normal_5feba0df817f5.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/ejagjjc/62763163476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_6015dcbe073a0.pdfIn PDF document text
    • https://timelasabo.weebly.com/uploads/1/3/4/3/134345700/fajobogovozojes_tesabuzoleb_kekegixukof.pdfIn PDF document text
    • https://megelegekirir.weebly.com/uploads/1/3/4/4/134464092/2724ca.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_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 5724 bytes
SHA-256: c32e27ee772a1cfc85648e42ac082ec865c6dfae5b23cbcf928322b3d3ee7bf0
font_01_sfnt_off0000f6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DF 10848 bytes
SHA-256: 0e8845abcc9be3c7e29d7b87fb2c1026dbeb8c89db798c9722b2156a6329ef0b

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