Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f05a75dd2641e5b…

MALICIOUS

PDF

70.8 KB Created: 2021-02-22 02:09:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0885d5d102849d1556ba31712a9d9207 SHA-1: 4b6d7facc33708c8bd525085d2ec6481778b428c SHA-256: 5f05a75dd2641e5b30043b7ac669968124c2cbeaac5d3869be28254e3dec2900
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://leonvi.ru/wix?keyword=oversized+tv+trays+bed+bath+and+beyond PDF link annotation
    • https://cdn.sqhk.co/butemobe/Whijohb/24922844568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_5fdc0a7b1c5d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449411/normal_600f64ec9d95b.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwovodegi/eimihT5/lara_croft_go_cave_of_fire_deadly_steps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_60210ecc1e847.pdfIn PDF document text
    • https://ratisatemapabuz.weebly.com/uploads/1/3/1/3/131398591/4191679.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413966/normal_5ffc7fab89f07.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/pifumuwotavake.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/gwwjdhg/eastern_front_june_6_1944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_6015b9842f668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5fd76beced6b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472198/normal_5fe2542905227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453891/normal_6002bc2504d9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422877/normal_5fcf42f3b6fc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387920/normal_5fc71df2c7956.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448731/normal_5fee1c4745e36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divikufifir/79147570381.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_off0000d48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48B 5260 bytes
SHA-256: 1b4206d6a39b1d8f08b5aa4da5629b2c2d96d39a018e81d77b3f29d996f43466
font_01_sfnt_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 11960 bytes
SHA-256: b6ca5acd1617c850dda7daeb422e83d9c538a44438ade39928c394e995371a94