Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d783429f207aba…

MALICIOUS

PDF

75.1 KB Created: 2020-11-10 05:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b24234fc07ca4aabff8e6cfa98453379 SHA-1: 8a69618c67f381fcf3e4207e4c75e4b444ee7183 SHA-256: f4d783429f207aba2425a31726cb91046e971ade581ac97ab4ae848810b241dc
196 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
  • 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://traffset.ru/wb?keyword=consumerism%20in%20brave%20new%20world PDF link annotation
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/9649040.pdfIn PDF document text
    • https://veraroligesabo.weebly.com/uploads/1/3/4/3/134377370/bejuwoxiti-golamopotux-kumelaxene-nelefipunatij.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/fa2887e4-45da-4fcc-a82c-10091644e0e5/medical_terminology_crossword_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3672bcad-02e2-4464-abf8-96243c48a4b0/gunijotegedepufifamoxuva.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/cardiopatia_isquemica_unam.pdfIn PDF document text
    • https://s3.amazonaws.com/suzitivasekoga/perfectly_inelastic_demand_ed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c721e85-4c37-4316-8702-02945675fca0/89608447437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c9437c-d3fd-493e-ab73-6420d82a0bf5/kiterapejalozufaperomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba42d43-64bc-467d-a9b5-900f356f7ebb/madazikodapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1fdfb7-29c7-4bf1-825b-84e12583396b/94555318407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1ed819-f0bc-4653-994d-515812c18d91/80471229897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80235cf9-1d7f-4dbc-b05b-773ad32902a0/84356866326.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/krishna_yajur_veda_in_kannada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88fc2406-ede1-4d5a-b19e-055bd386ffdb/graco_4_in_1_crib_instructions.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_off0000ec2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 5168 bytes
SHA-256: 9f2e2c4386dbe18783c89342f216e9951b3523d0bbc723e29cf4cbd0db611a89
font_01_sfnt_off0000fdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 9948 bytes
SHA-256: cc27d4a13ad70b9530098f56f324a49ae4f094695a6fc80996f984356e48f731

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