Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2c0484b1a772a4…

MALICIOUS

PDF

108.6 KB Created: 2020-11-14 03:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 246d28c9cbac9060275c29c81cd2c63f SHA-1: 274cac4d8fcb06fd8376e6999716bcad508588f4 SHA-256: ac2c0484b1a772a4faf76ba50d6fb11088af120a83b8e89fdf48ef506b7e5892
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffking.ru/123?utm_term=junior+drum+set+near+me PDF link annotation
    • https://gobebirerelimi.weebly.com/uploads/1/3/4/6/134651667/7721590.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/3b1e076e-bdbd-4a0b-92d3-ffa2d91210f6/mulebolaxidosoxogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5026fc6-51d0-4fa4-85fb-971247b6b994/lujemanatufutexamufapuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb3802f-a956-43cb-874e-c6dabb72a532/16175182717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4749d765-bbaf-4dce-94dc-3f8f45718e6f/tegupogazewavaki.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/71507220636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4dd7eb0-cebb-4e14-a92f-56190d5b3ebf/best_orthopedic_doctors_in_tulsa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d87b372a-0439-4c29-a87a-a71b0a9eca81/naruto_shippuden_episode_166_english_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/misofowamupurofolanojiz.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/41625722497.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/asterix_comics_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16626 4928 bytes
SHA-256: 8dc28ddd23e53ca2a5a04aa29f2cbf166ffe732727021e88786a577306db5fc1
font_01_sfnt_off000176c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176C2 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00017f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F4F 11284 bytes
SHA-256: caae64ed6475f36da5536db338b381ea315a3548e9368bcda0a5360b0fe7aeae

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