Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed84226ccca485d…

MALICIOUS

PDF

79.0 KB Created: 2021-02-10 22:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c25968c6fe8a2c4c3ed5f1a40fbefced SHA-1: 4744843c362d2e8242a34bfb024e64f524cfab04 SHA-256: bed84226ccca485d84e24cb5fab6988b2064d276883dcc08fff53e3d78b154b4
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/wb?keyword=c%20number%20format%20two%20decimal%20places PDF link annotation
    • https://radinake.weebly.com/uploads/1/3/1/8/131856095/9368072.pdfIn PDF document text
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/9a9a5a513049add.pdfIn PDF document text
    • http://idealsit.fun/super_smash_flash_all_characters_unlqb2uy.pdfIn PDF document text
    • http://stnold.com/synonyms_meaning_in_englishd9m8f.pdfIn PDF document text
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/5785294.pdfIn PDF document text
    • https://tepupusaf.weebly.com/uploads/1/3/4/5/134585026/355932.pdfIn PDF document text
    • http://sodaapp.pro/pubofodewusaxa08tk6.pdfIn PDF document text
    • http://like-store.site/1896_snowball_fight_video9hv3p.pdfIn PDF document text
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/xulapiri.pdfIn PDF document text
    • https://verukutuxa.weebly.com/uploads/1/3/5/3/135330203/vamularebiburotonin.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/bokelur/30026046199.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/economics_circular_flow_diagram_practice_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/63603422620.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/54653730379.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/89350715943.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/wotimajuzupesosut.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/43545726799.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/adelaide_showbag_guide.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_off0000f0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 5440 bytes
SHA-256: 99f0b0550ddf5b6d076c62c2a14d46ec77271bc06105d7b37288bd5429c307d0
font_01_sfnt_off00010357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10357 13292 bytes
SHA-256: be6b23ebbc192a56f8e773a7aaf78a768e581826ea203a0b29d4b036d1a6a062

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