Malicious PDF — malware analysis report

Static analysis result for SHA-256 e792c04cb07101bc…

MALICIOUS

PDF

68.1 KB Created: 2021-01-08 08:33:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c1bf84c0f2d84ebea6f2c9c1fed37dd2 SHA-1: 31bb8c08b08691310573ecff3a16165f11fb05c6 SHA-256: e792c04cb07101bc69c7c8ae1312b0c0532c5f21fff088a1b863447bb45f85cb
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://traffking.ru/aws?utm_term=convenience+foods+lanka+plc+annual+report+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4466135/normal_5fa7e6ef8fc39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5f8ed5781fe74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5fa0019de16b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403681/normal_5fc8434a77f49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_5fdb80d56838b.pdfIn PDF document text
    • https://bibikabefome.weebly.com/uploads/1/3/5/3/135392895/vozumunikefe.pdfIn PDF document text
    • https://sewizafisebe.weebly.com/uploads/1/3/1/4/131437566/7474742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380881/normal_5fe0ab4bdd13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f8a2f2994847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5f9cb8ccb51d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443354/normal_5fc4037ada747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459926/normal_5fbb516997f82.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/xibifobamenotexijef.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/564e9a49-22d1-4525-8542-e37b447127d6/85528102516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8144e30f-a973-4f53-bf35-f061a41f6341/notice_ampli_yamaha_htr_6040.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_off0000cb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB74 5660 bytes
SHA-256: 2312d29d515a5778422b221e442646f9da10fe6bc7b7c472f961b71c24f9b486
font_01_sfnt_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 10776 bytes
SHA-256: 52dc4f385a16aa81135c20ef5b292f2e6c29b71171df8f14c07d2745023dbe39

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