Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbd96eef9d45b2a…

MALICIOUS

PDF

69.2 KB Created: 2021-01-30 02:39:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3e67f42635419a4ebef6e3ff6ce77230 SHA-1: 591cd2d3d09781a9849458b6c8f5f60b43a9293f SHA-256: 6cbd96eef9d45b2aab26e5f413197f355f1857bba6d6a751ff00ddadf33b661f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URIs and a link farm heuristic strongly suggests an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://leonvi.ru/123?utm_term=scenery+config+editor+p3d+v4 PDF link annotation
    • http://sberin.xyz/world_war_game_download_freec4jqz.pdfIn PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/fomavituvozasa-woforanarepiwo.pdfIn PDF document text
    • https://moduruwili.weebly.com/uploads/1/3/2/7/132710657/91dba9d0348e3.pdfIn PDF document text
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/6148140.pdfIn PDF document text
    • http://detonic-hypertonie.website/10714264026qin4w.pdfIn PDF document text
    • http://yoga-fitness.space/noxious_weeds_of_australia41pr7.pdfIn PDF document text
    • https://mexasazage.weebly.com/uploads/1/3/4/5/134513067/6372883.pdfIn PDF document text
    • https://narapafugoziror.weebly.com/uploads/1/3/0/7/130775848/471e74688f1339.pdfIn PDF document text
    • http://50off.pro/379705119754tiku.pdfIn PDF document text
    • http://myimperfectmomlife.com/yanni_nightingale_sheet_musict11ns.pdfIn PDF document text
    • https://donefuvo.weebly.com/uploads/1/3/1/1/131164418/disogediga_ligodeki_wiregenefol.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/6611172.pdfIn PDF document text
    • https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/355ee29.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/7139279.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/49002452346xm5c7.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/zikeko/96610739176.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/nefademitaxejuwul.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/cyberflix_apk_for_laptop.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_off0000d0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AA 5420 bytes
SHA-256: 1b4b08c90c948aa389b6c9494c584f1cdb6e0b8025e6f2d29172c33a7794ddd2
font_01_sfnt_off0000e34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34C 10740 bytes
SHA-256: 7252e565651e24aa729f484db131ee14e60e5a5b9bd0c9d2232cbfb3df87939a

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