Malicious PDF — malware analysis report

Static analysis result for SHA-256 6974cf2488acfe92…

MALICIOUS

PDF

72.2 KB Created: 2021-02-27 03:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 77b6913be31d83122f7f52523242088b SHA-1: 30830f7178b24822a34fa9677ae27bc91485197e SHA-256: 6974cf2488acfe92357a2d508e1eb9af72edd84618c383bb11bcf2cc18e2131e
194 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable hosting or redirectors, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to lead users to download further payloads, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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
  • 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://nipisod.ru/aws?utm_term=crysis+3+t%25C3%25BCrk%25C3%25A7e+yama+indir+gezginler PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5fd8d941152f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_601ebe2a34559.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/the_divergent_series_insurgent_full_movie_in_hindi_free_download.pdfIn PDF document text
    • https://defasoxajex.weebly.com/uploads/1/3/1/4/131405962/5111938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_5fe62d5e24343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497110/normal_6017c252cfe1b.pdfIn PDF document text
    • http://kkkirrreeee.space/5755826091800c0u.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/what_is_honesty_definition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417305/normal_5ffc02f078a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460680/normal_5fdb159486f46.pdfIn PDF document text
    • https://kuwuxezito.weebly.com/uploads/1/3/6/0/136090431/zitupowelarux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5fd0ed6b74c9b.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/bisamuribusifara.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_5ff32d306b41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_602d59836c0b7.pdfIn PDF document text
    • https://mofafodoler.weebly.com/uploads/1/3/0/8/130874416/wujotejanuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_5fe636b51dd55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokosen.atwebpages.com/hp_laserjet_4015n_printer.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_off0000d82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82C 5732 bytes
SHA-256: 8e3d4fc9dc2b165daee28a485478725e2dece2a075433072730f8d7f17499dee
font_01_sfnt_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 12220 bytes
SHA-256: 7f06e0758263901c205dfd6aabe03977990449ae7dabcce27b9060c86b80d711

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