Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdea8da527f88c4…

MALICIOUS

PDF

71.3 KB Created: 2020-11-18 07:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02f48358fb27b381b55f9d85224c6200 SHA-1: e7c8a87e4859265ca8d8a3d418adfd618f7287d0 SHA-256: 3fdea8da527f88c477a27a379d07155a392eff2da4c3e93ccd65fbf7f61288c7
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'SE_INVOICE_LURE' indicates the document attempts to mimic an invoice or payment notification to trick the user into clicking the malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffe.ru/123?utm_term=how+to+print+customer+invoice+on+ebay
    • https://suzaruluzi.weebly.com/uploads/1/3/4/4/134455671/41a0797b7ad2.pdf
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/666c4a.pdf
    • https://jinuvavuvebox.weebly.com/uploads/1/3/4/6/134612635/wadipex_zisebuto_mulanin.pdf
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/0d8124d94824.pdf
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/witojusogo.pdf
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/3f15494d9663fa.pdf
    • https://suxuwimuwudex.weebly.com/uploads/1/3/4/6/134641155/xewab.pdf
    • https://zubosaverebaf.weebly.com/uploads/1/3/4/4/134468350/jifawugediv.pdf
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/2796375.pdf
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/2128388.pdf
    • https://tivulose.weebly.com/uploads/1/3/4/3/134318041/topamurixazota-xavokajikesute-xuwuzawigoliton.pdf
    • https://futiwetag.weebly.com/uploads/1/3/4/3/134367494/gobetaxisixabobida.pdf
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/ca0859328b36bf.pdf
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/3401972.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jakujakula/wipidarejokexirir.pdf
    • https://s3.amazonaws.com/lefemijip/mibukalaze.pdf
    • https://s3.amazonaws.com/sixenogafopoj/cambridge_ielts_6_reading_test_1_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ad.bin
460c097aee5152929e74aa083bba1550974e1b2e134840116e6af8907bb41336		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AD 5404 bytes
font_01_sfnt_off0000e306.bin
8770a9d16f6ec8ed1e04f7f31595c1fd3834ff76ff6f55291086ab87d6d749e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE306 2268 bytes
font_02_sfnt_off0000ed18.bin
194de175f55d94fe6172b2fa109e426d1d62f5de4c4e6717af62968238b94d90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED18 10072 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.