Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46d65e8d5fdd42a…

MALICIOUS

PDF

67.4 KB Created: 2021-02-27 15:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e2a60b80fc8edf352d4e1e812605fd0 SHA-1: e3e79218b03b6c1f51d85a8982fa4a21095f2da5 SHA-256: e46d65e8d5fdd42aeafc684fd5ca4f9d1cdb39e69f91b0403e3aea436ac91874
186 Risk Score

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 0.9998

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://fokemale.ru/wix?keyword=zing+ear+ze-310d+lampholder PDF link annotation
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/5778607.pdfIn PDF document text
    • https://xuserufibizu.weebly.com/uploads/1/3/4/1/134131258/govegewutu.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/3138549.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/7ec171ccf0760b.pdfIn PDF document text
    • https://kekuzisalan.weebly.com/uploads/1/3/0/8/130813403/f63b74b20.pdfIn PDF document text
    • https://mikugixu.weebly.com/uploads/1/3/1/4/131438693/a6e983c.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/jotajawudujo_tefora.pdfIn PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/4342640.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/kokifo-lebonisabazok-gilak-dewusiga.pdfIn PDF document text
    • https://bigakajufejala.weebly.com/uploads/1/3/4/2/134265656/xomilamazimotusar.pdfIn PDF document text
    • https://tujowijide.weebly.com/uploads/1/3/0/9/130969571/saferaxapavijim-wopuv-kosuxumezix.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/1727552.pdfIn PDF document text
    • https://rofewure.weebly.com/uploads/1/3/3/9/133999154/cc3b0736e00.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/vapapu.pdfIn PDF document text
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/deff5df37f311b4.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/xeroguru/karekejulope.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/accounting_practice_problems_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/47651588125.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/68713825890.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/33297737192.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_off0000cb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1C 5592 bytes
SHA-256: fc3fda4a36303bdfd64697a8a107b8c0c9c5dfb89b8a8e9c08ad631fd3bae9f9
font_01_sfnt_off0000de0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0A 10088 bytes
SHA-256: f5552e6c728ef6a40e923d7cdb3268fecd3d75abfb790a60eb722414e058b267

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