Malicious PDF — malware analysis report

Static analysis result for SHA-256 baeeff232f2fba01…

MALICIOUS

PDF

58.7 KB Created: 2020-11-21 23:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66b04db4c4a5a0d7ffa76349ca547117 SHA-1: 0ddde2199b8612c0dd001fc67562e49c4b698203 SHA-256: baeeff232f2fba01c78798ffb3fd9b5476b59e27761249deaf8f13ba13f86fc8
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/123?utm_term=mike+wazowski+woman+shirt
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/xabuxeremulaf.pdf
    • https://zetizisoxaw.weebly.com/uploads/1/3/4/4/134498522/f4d7066a5.pdf
    • https://zopewurexolo.weebly.com/uploads/1/3/4/5/134519391/futil.pdf
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/c641b19961.pdf
    • https://wowomake.weebly.com/uploads/1/3/4/6/134679477/xusokikupadatiwexe.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f9a2aaa56102.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuxenipup/89197117597.pdf
    • https://s3.amazonaws.com/moduxanakuri/lagu_a7x_bat_country_live_lbc.pdf
    • https://s3.amazonaws.com/mipeboro/amazon_card_generator_no_survey.pdf
    • https://s3.amazonaws.com/mesixadelomomo/sukorelabivozesasaxana.pdf
    • https://s3.amazonaws.com/fodose/jasowunegitoxu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a997.bin
74ff62d3e533720d1b4f2284cd38f2884a7aed3c0f65714550b9c185d91b7450
pdf-font-stream PDF embedded font (sfnt) at offset 0xA997 5104 bytes
font_01_sfnt_off0000baee.bin
4ff0eb41f19825fbafb6010e1b207f8e8bb97af2f806c979d10d64239644025b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEE 10476 bytes