Malicious PDF — malware analysis report

Static analysis result for SHA-256 af83225c1ffce07d…

MALICIOUS

PDF

64.8 KB Created: 2020-11-10 19:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: fea4aa33a998709712b069e53a07756d SHA-1: cc067bc0861999b53cd93de6231e1c52b795b476 SHA-256: af83225c1ffce07d6a767757d76884666ffb8f39a850bad22b4d0c0c69367ac0
186 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/123?keyword=valentine+livestock+market+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f872c0c2a7be.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/fidavigutawewe.pdfIn PDF document text
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/e23b0eecef3.pdfIn PDF document text
    • https://tanutalavisa.weebly.com/uploads/1/3/4/0/134000413/f28af2218c9452c.pdfIn PDF document text
    • https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/0b845.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/8b7802d7578.pdfIn PDF document text
    • https://sutukukibefatu.weebly.com/uploads/1/3/4/4/134486522/2271277.pdfIn PDF document text
    • https://fevijalefo.weebly.com/uploads/1/3/4/3/134383315/2254864.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/554d30f5-fbfb-4785-8688-9b7d00c233c5/unblocked_multiplayer_games_tank_trouble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1490f620-5679-41f1-aa5e-d2a4f2f177db/youth_basketball_plays.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/kujubipaveju.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/psychology_dictionary_online_free.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_off0000c053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC053 5168 bytes
SHA-256: 1450f78fbb9f437b02780a1ae8982de91a2e671a4c35a4f14c358b62072d247e
font_01_sfnt_off0000d1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DB 10808 bytes
SHA-256: bcc464a4ead798f49fd38a3d1f538d9f88aa4b5bc2a44602515af16c85998715