Malicious PDF — malware analysis report

Static analysis result for SHA-256 467d3726fcf44a87…

MALICIOUS

PDF

85.2 KB Created: 2021-01-08 05:35:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6d18933cc778987d815619a4f30a7bb1 SHA-1: 775ce6974f89c07317cadf5c21fe2ca0ec3150f5 SHA-256: 467d3726fcf44a8702ac1bb227ad9b1536a86e7bf41480a9472e2ba7364a2ae9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with one primary URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=mega+man+x+weaknesses PDF link annotation
    • https://gidixolatuloxag.weebly.com/uploads/1/3/1/0/131071157/61803d32b5f.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/aHieRgi/action_hero_biju_comedy_actors.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/bjcNeji/feeling_alone_positive_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/xugikokazo/jnsgehd/77878080463.pdfIn PDF document text
    • https://tawurinerumirun.weebly.com/uploads/1/3/4/6/134648739/1754973.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/hePigjd/disney_princess_adventure_stories_game.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/8100678.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/b14a90ea654.pdfIn PDF document text
    • https://cdn.sqhk.co/lazogapuvo/kihhJUZ/teladoc_stock_canada.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/51d0413d-450d-48a3-9c24-da0e5fed68a5/3321930309.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/list_of_ambiguous_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c89b0201-af9f-4139-946b-5c17fe086233/70727828789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50159271-1a5c-4023-9ceb-17cbf3051f27/dopisazawinadipete.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/eenadu_epaper_telugu_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C7 5104 bytes
SHA-256: 687d37effd1fabf3c04b5a81bb494634cd7831ed9d33d0e61a8dda1ba17dd355
font_01_sfnt_off00012442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12442 10388 bytes
SHA-256: 3c2368f4a30a8446f525b878c656f3119655a40756d9cd1bfb8aad333b14acb2

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