Malicious PDF — malware analysis report

Static analysis result for SHA-256 d242c1db94126925…

MALICIOUS

PDF

77.8 KB Created: 2021-02-20 21:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 05bc07a99ace579c04ced5f4d1d329c5 SHA-1: f3192b2d9ebe9a6f93e2635697aa07a7e985de76 SHA-256: d242c1db94126925d780b8eab8a5fea7b8b7e506d052f5eb86a2f1d35e3ea8d7
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malware or engage in phishing. The embedded URLs and the structure of the PDF point towards a malicious document designed to redirect users to potentially harmful content.

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://druttle.ru/strik?utm_term=les+mis+original+broadway+cast+recording PDF link annotation
    • https://vobanugan.weebly.com/uploads/1/3/5/3/135340106/voxagu.pdfIn PDF document text
    • https://fasiwuwazaxeba.weebly.com/uploads/1/3/1/4/131438460/nimobaguk.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/hizGhcq/74972622074.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/hgeChh3/81445887550.pdfIn PDF document text
    • http://fetokoporumof.22web.org/battlefield_of_the_mind_bible_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/40phgz7/dawn_of_steel_fallout_76.pdfIn PDF document text
    • https://denimuka.weebly.com/uploads/1/3/4/5/134582609/lagobokixot_duzamuguxiw_sadikexojasaz.pdfIn PDF document text
    • https://cdn.sqhk.co/gidowoji/hjcifih/join_asgardia_space_nation.pdfIn PDF document text
    • https://cdn.sqhk.co/bikugipozamu/FSphefn/download_demolition_derby_multiplayer_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/iiLjhjc/usatf_junior_olympics_future_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/rjhhajf/tiktok_mashup_october_2020_with_names.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/GPjfhhv/xuvosokixudidemoxi.pdfIn PDF document text
    • https://zesalogerevuj.weebly.com/uploads/1/3/4/6/134684883/62c39c.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/zubixodugax-rezosubez-pisurajej-zegukuku.pdfIn PDF document text
    • https://fedijukesubi.weebly.com/uploads/1/3/4/6/134600597/gorinatamibe.pdfIn PDF document text
    • http://wotimijivebizu.iblogger.org/how_to_overcome_moral_dilemmas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xobiluwova.epizy.com/42826942998.pdfIn PDF document text
    • http://gibexuge.rf.gd/67864529608.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE509 5320 bytes
SHA-256: 601deb174665a51b8a0d71cb787acd44f2e5f8a4f197d6b28d3fa7c439e1427b
font_01_sfnt_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 10808 bytes
SHA-256: 075929310ad6f89dcf373d7323affc3174e89e32aba1276a70eb4e34d739289b
font_02_sfnt_off00011bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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