Malicious PDF — malware analysis report

Static analysis result for SHA-256 baee8a413adf6e38…

MALICIOUS

PDF

97.7 KB Created: 2021-05-12 23:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d0c9d3ea5422c04c6b7e52b644cf18f1 SHA-1: 74ee5bb5e174b04c1d57ba97ac1d00ef53f93d32 SHA-256: baee8a413adf6e3835dc8283b73708ee32ab0fed273e31ef82628f477003720c
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to potentially harmful websites, possibly for phishing or malware distribution. While no scripts were extracted, the extensive use of external links and the ClamAV detection indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://yafferge.ru/strik?utm_term=12+angry+men+play+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_602e3f99ec33f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_60449f393e01c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_6067fde3aa612.pdfIn PDF document text
    • https://wevabubuked.weebly.com/uploads/1/3/4/5/134584052/kidutujopafoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_6011b42933d72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455195/normal_5fcc097ca88be.pdfIn PDF document text
    • https://votusaponepo.weebly.com/uploads/1/3/4/4/134471583/6437117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fcdb38009d5d.pdfIn PDF document text
    • https://zixudepapu.weebly.com/uploads/1/3/2/3/132303172/negipovu.pdfIn PDF document text
    • http://forumapu.iblogger.org/30916398903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_602a4ae74c4c8.pdfIn PDF document text
    • https://newomuzupigew.weebly.com/uploads/1/3/4/4/134468212/385eba61129b4e4.pdfIn PDF document text
    • https://boduburul.weebly.com/uploads/1/3/4/6/134654649/bajadokedano-juwib-womagove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_6048884eb71a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_602faf4b2cd11.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/tumasun/tajigobasamutunumuvifa.pdfIn PDF document text
    • http://katanitape.rf.gd/used_car_salesman_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/credit_karma_uk_how_to_print_report.pdfIn PDF document text
    • http://gamexelonin.rf.gd/learn_advanced_javascript.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/51689098592.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/are_coroners_reports_public_record_in_ohio.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000137dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DD 5376 bytes
SHA-256: 69763ba05b03ee8449f3abd501a6e290e19b197411237b3c0d7ff4e204fef759
font_01_sfnt_off00014a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A14 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000152a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A1 11380 bytes
SHA-256: 49ec748e2326201bbf589c8ef2a7e8782f660eeddead53e93022ee96b61a4d85