Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4bb9e0e4ed01560…

MALICIOUS

PDF

70.4 KB Created: 2020-11-11 06:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fea49eb3f6fb33d392cc3337a429570b SHA-1: e4ecdad64c52c8a7e3be88bf874212a7ef6ea2b5 SHA-256: f4bb9e0e4ed0156021e427c3e57bd0941ee8c8585d505ca558f9a74d9a56acdb
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://traffnew.ru/aws?keyword=fluency+poems+for+3rd+grade PDF link annotation
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/1a1406fb6a.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/liguwubore/spell_to_make_someone_want_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ab32ac-7728-4412-ba3d-438d5516df9a/79721333603.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/rinuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ddc015-d481-4ab1-81c3-6e9b2e675a9a/12838070870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d235babe-d0e7-4e8e-bf08-5e7de3e54644/10101116286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d086535b-4035-4c6f-891c-71cd68cb3e7b/vewevemelezenagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d461ab36-d7ba-4dc1-b830-25b8c74694e7/81898109735.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/nudefopakeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3a6112-cb09-40a2-aff9-8df8d485bbd5/44795318475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57d3630-4b2b-4776-a5fd-5bb0143ae5f2/54649354362.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/paypal_money_generator_exe.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_off0000d338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD338 5696 bytes
SHA-256: 3293c3cc95a2b50384926216a123756a2a6229b93057c0b8a754cd4a8df47d87
font_01_sfnt_off0000e693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE693 11196 bytes
SHA-256: 6108c7dbc298fd3fdaff2dfa97cbe49d338709a54d8d3c814d2d854c9ecb7114

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