Malicious PDF — malware analysis report

Static analysis result for SHA-256 0635129de5c34393…

MALICIOUS

PDF

71.6 KB Created: 2021-02-26 16:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d7c438a78ad8b096c9bc7c91b6122b57 SHA-1: 3f4534d1e8ad45052f27686558bf0623ffa004d4 SHA-256: 0635129de5c34393bec12af191faf8ebcca04cb1cbbdaab880b2213339a1ea4b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://jottigo.ru/wix?keyword=i+think+beauty+is+relative PDF link annotation
    • https://cdn.sqhk.co/mirofifuba/ohDjfY6/elite_prospects_spring_hockey_tournament.pdfIn PDF document text
    • http://optamorem.com/terra_nova_test_results_2017lf5en.pdfIn PDF document text
    • http://itabody.space/direct_and_indirect_characterization_worksheet_answers4k6y0.pdfIn PDF document text
    • https://zaporori.weebly.com/uploads/1/3/4/1/134131460/6e5eaf6801.pdfIn PDF document text
    • https://pedesidava.weebly.com/uploads/1/3/4/3/134355179/4541114.pdfIn PDF document text
    • https://tekofudarazot.weebly.com/uploads/1/3/1/3/131381521/c0791012988d02.pdfIn PDF document text
    • https://maverutorolo.weebly.com/uploads/1/3/5/3/135393183/sodenotexevil.pdfIn PDF document text
    • https://wilumixomili.weebly.com/uploads/1/3/1/4/131483065/famakow-jofivilav.pdfIn PDF document text
    • http://opt15.ru/food_hygiene_worksheets_freebym3e.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/voxulija/1745485262.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/zevoxomasibudonotaf.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/wiramupafesuvurodezix.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_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 5076 bytes
SHA-256: 5bbb6598c5aed1cf06befbd5acfe5f19adeb0312706748fdefcefae5b40b133e
font_01_sfnt_off0000ef83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF83 10116 bytes
SHA-256: ae72530c36782d9875065e33cfccf98db3a72366aefb381f4f98819974ffca22