Malicious PDF — malware analysis report

Static analysis result for SHA-256 12043d4ae7f25920…

MALICIOUS

PDF

75.3 KB Created: 2021-02-26 03:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bc513a461972dfb33cd266fde86d2e77 SHA-1: 21f8901e8e2b5040de2cddab6b6680470b798bac SHA-256: 12043d4ae7f25920e8fef450f0ffe70a6ef74b179ecdf0196a5ba62ecf97fdc5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external URLs, with one prominent URL being https://baarspo.ru/strik?utm_term=traditional+christian+christmas+music+youtube. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links on disposable domains, further supporting its role as a lure. No scripts were extracted, but the overall structure and URL presence point to a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/strik?utm_term=traditional+christian+christmas+music+youtube PDF link annotation
    • http://mattelipsticks.site/webiburua0yu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421210/normal_6027e639321a3.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/OgfjauC/wifi_software_download_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/iejAgjb/score_hero_answers_level_207.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_5fff36375fffa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384307/normal_5ff9ee84143a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481286/normal_602beecb3728c.pdfIn PDF document text
    • http://grizhoff.ru/538693593963atew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454168/normal_6003748324fd5.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/hcHZGhg/63851375944.pdfIn PDF document text
    • https://cdn.sqhk.co/wefopijupe/idlF3ji/30322584767.pdfIn PDF document text
    • http://eeeeeyyy.space/paris_metro_map_2020_downloadxl94u.pdfIn PDF document text
    • http://lajalura.22web.org/49552376504.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidefos.epizy.com/63748180697.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/xufowujadinutalos.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_off0000e9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 5372 bytes
SHA-256: 3e49efddd6e1a7fc58399276d2483144112d991be06c31be58d44147fbca89b8
font_01_sfnt_off0000fbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFC 10712 bytes
SHA-256: 7e1e50575bba305d6057c7e6414ce9636c5873508c6b94261f5c6d6482f13388

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