Malicious PDF — malware analysis report

Static analysis result for SHA-256 86647fe6e5c1544d…

MALICIOUS

PDF

69.4 KB Created: 2020-11-24 15:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0da73c78c698f477738890213670249 SHA-1: 1a565e7559563c40efcd5860878a43ee8312ecdd SHA-256: 86647fe6e5c1544d4d8d26e59e2869f6d8ff4b314af869f2689ab6cf18efe47b
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external links suggest a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://ggtraff.ru/123?utm_term=ofsaa+track+and+field+state+results+2019
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5fbc89eb12e1b.pdf
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/ceb57296b5774.pdf
    • https://cdn-cms.f-static.net/uploads/4481065/normal_5fa710736c70a.pdf
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5fa43dee81087.pdf
    • https://mejawazur.weebly.com/uploads/1/3/4/2/134265830/pinotopofedazuf.pdf
    • https://jixidaku.weebly.com/uploads/1/3/4/4/134495137/rotezolezakam_gififofofola_supop.pdf
    • https://fupesovuzej.weebly.com/uploads/1/3/4/0/134016868/ccac35f35ab55.pdf
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/fd3746088af.pdf
    • https://cdn-cms.f-static.net/uploads/4420018/normal_5fa11290adccd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/firigugixujotov/staar_2017_answer_key.pdf
    • https://s3.amazonaws.com/zalisujezajaje/bunome.pdf
    • https://s3.amazonaws.com/jupevuxirapi/bimolebanekibi.pdf
    • https://s3.amazonaws.com/mizeteb/blitzer_college_algebra_6th_edition.pdf
    • https://s3.amazonaws.com/ginutu/barbados_nation_paper_news_family_notices.pdf
    • https://s3.amazonaws.com/jamokaroxoj/bosquejos_sobre_la_familia.pdf
    • https://s3.amazonaws.com/lixasifasi/dixegape.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_off0000c3d4.bin
0f67c92e2737ac853e2e33977a7eec57ca88a665e8a942b232f100d766b94bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D4 5360 bytes
font_01_sfnt_off0000d61a.bin
709a37ddbcc2d9f5405973dea8435c70e8b8afc24aeeed9ed1731356c3c7d687		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD61A 10660 bytes
font_02_sfnt_off0000fa89.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 4324 bytes

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