Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a4169a640f6491…

MALICIOUS

PDF

72.7 KB Created: 2021-04-04 10:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ef41bf323d93eab374facd585c33b7d4 SHA-1: 3e33970ea24ed34b672aad149b2b8c159a0b6391 SHA-256: f1a4169a640f6491d8555982beb477bc004d30bf49f8b3d172aaaf3af14a3241
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('soxebez.ru') that appears to be part of a link farm designed to redirect users. The document body, though heavily corrupted, contains keywords related to 'Volkswagen service center', suggesting a lure to a fake service page. No scripts were extracted, but the presence of multiple external links and the overall heuristic profile strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=volkswagen+service+center+near+miyapur PDF link annotation
    • http://taptopbot.com/kexibikaris52ywt.pdfIn PDF document text
    • http://wrestling-mma.com/62708129699q4cv5.pdfIn PDF document text
    • http://rinevagisovagi.22web.org/4776408673.pdfIn PDF document text
    • http://xtina.online/17956336785mvbrk.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/KaIGgjb/33808175978.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/79496033838.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/faxogesomulitod.pdfIn PDF document text
    • http://daimontimur.org/kajafeladenu32a.pdfIn PDF document text
    • http://nutristrike-shop.ru/13165819089bip1l.pdfIn PDF document text
    • http://turistik-a.ru/is_anything_at_panda_express_keto_friendlyaqvbf.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/esgcif9/black_widow_release_date_usa.pdfIn PDF document text
    • http://classkaod.ru/the_grapes_of_wrath_study_guide43en7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/america_the_story_of_us_bust_worksheet_answers.pdfIn PDF document text
    • http://wagivudixar.epizy.com/zadaxokojome.pdfIn PDF document text
    • http://ralipuzejemozuz.epizy.com/vietnam_war_protest_songs_worksheet.pdfIn PDF document text
    • http://mivazofirogo.epizy.com/xogopimarusesegeso.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_off0000db2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2A 5536 bytes
SHA-256: c01d298e2daf05afd4f84a16a3987778045005601d30961aa9161d361acbf457
font_01_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 12064 bytes
SHA-256: cc69f42297058c54ab4b732de6ff01630afb7c49fbcc8fc574f2377a76512cf8

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