Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e0e7c2e22b985b…

MALICIOUS

PDF

77.4 KB Created: 2021-02-17 12:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: debc86cfa82dd877a986f4f7d98c517e SHA-1: f1b956b59cf881c44f534c24c39d999055f5553d SHA-256: c0e0e7c2e22b985b156ae6afb9ac697f07a593b483514c8099b0510648043b4f
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://yafferge.ru/123?utm_term=canon+powershot+sx510+hs+battery+life'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external documents. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', indicating a phishing or trojanized document.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=canon+powershot+sx510+hs+battery+life In PDF document text
    • https://static.s123-cdn-static.com/uploads/4381976/normal_6004e8dc32589.pdfIn PDF document text
    • https://gogadumipoti.weebly.com/uploads/1/3/1/0/131070618/mavepixif-bomokilesizaz-mekiwenuz-rikamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5fdc498034d12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_6022e1731a669.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/wuwabobujasivor/electronic_configuration_of_bromine_in_numerical_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/buderekilote.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/spotify_music_to_iphone.pdfIn PDF document text
    • http://nosikugabuvisal.epizy.com/godfrey_phillips_annual_report_2017-_18.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/kofamejaputin.pdfIn PDF document text
    • http://nokemufebevezo.rf.gd/logudokuweniguvofa.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/vt100_terminal_emulation_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/odia_superhit_bhajan_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/amrish_puri_dialogues.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/bosch_dishwasher_manual_shem63w56n.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_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 5612 bytes
SHA-256: 2c4cde694ea29f0aae3dbc0949e0b5e5546dca616c784b7d35e8d8854b426b47
font_01_sfnt_off00010366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 10904 bytes
SHA-256: e418d67a960b9c107e6aa506e842d3b05839c886d8e70abebc87f838721e3ea4