Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc7f869d556722e…

MALICIOUS

PDF

83.3 KB Created: 2021-02-19 00:25:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ce1418ef13190637530f3d14cd4643ec SHA-1: 6cc4fdbe460476984479eaa070c8640ada2df79d SHA-256: afc7f869d556722e93ed63a01554d47811b6185324b5cfa6eee878af8501b7f7
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

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
  • 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.
  • 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://seumenha.ru/strik?utm_term=diferencia+metal+gear+solid+2+substance+vs+sons+of+liberty+cheats PDF link annotation
    • http://kersita.fun/5237829134vxwow.pdfIn PDF document text
    • http://testrun.ru/766758727091h3tc.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/MOgiMfo/kung_fu_zoom.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/modupoveli.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/iaDiahc/greatest_war_strategies_of_all_time.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/hfifB2U/77982618629.pdfIn PDF document text
    • https://guxovixig.weebly.com/uploads/1/3/5/3/135317997/5339008.pdfIn PDF document text
    • http://reduslimitaly-official.website/lomezev8gor.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/ihjjjdc/tegafolaxamujis.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/1gjjbTA/download_game_toca_kitchen_sushi.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/aicInhi/babita.pdfIn PDF document text
    • http://womenit.space/wizupolewujubemorp1wob.pdfIn PDF document text
    • https://rupubonu.weebly.com/uploads/1/3/0/7/130739332/8296265.pdfIn PDF document text
    • http://xiravudes.22web.org/64850189092.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/4454858.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/tgdXAd3/4012_isle_of_pines_dr_moneta_va_24121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ledukuxadom.epizy.com/carti_despre_antreprenoriat.pdfIn PDF document text
    • http://baverasoge.epizy.com/cinema_box_apk_for_pc.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_off0001061a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061A 5868 bytes
SHA-256: 1e85485e8f6df1ea971cb64c81ef0d7b6b16e4c07eef36a10b46fbe83b8b961f
font_01_sfnt_off000119fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FB 10860 bytes
SHA-256: d97b92e5c019796d9abaf8f671058ce99030048e920b55463feb44bb7ea8969c

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