Malicious PDF — malware analysis report

Static analysis result for SHA-256 68553901497b7629…

MALICIOUS

PDF

75.3 KB Created: 2021-03-23 01:37:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9b1fc73f1cadd287fcffc0681b26f0b0 SHA-1: 841923aa9206b4e61cc635c58b65e5c620708183 SHA-256: 68553901497b7629e1aa9e8f853a3284d53e5d354b7319753ffa7cedc9ef39f5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/award?keyword=guia+de+aceites+esenciales+doterra+pdf PDF link annotation
    • http://lnstagramcopyrigtservice.com/112356112212y06d.pdfIn PDF document text
    • http://mexicotop.xyz/39305204632ogsi5.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/hh7umWp/cute_dogs_names_in_spanish.pdfIn PDF document text
    • http://aydym.club/zaputirifoxukimavowetonj0u0w.pdfIn PDF document text
    • http://lnstagramaccounts.com/best_car_racing_games_ps4japli.pdfIn PDF document text
    • http://tefozunamosolo.iblogger.org/rokimiwidofuvusujekonuri.pdfIn PDF document text
    • https://cdn.sqhk.co/kunutewiwit/ICnjchj/15893992019.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/jg7gjjf/pop_culture_catchphrases_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mekibekowufe/gF7ljau/lifezagutedugipati.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/b6iQqgd/amana_stackable_washer_and_dryer_lowes.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/kimorij9gun.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/ngcighG/star_trek_fleet_command_guide.pdfIn PDF document text
    • http://punaweb.iblogger.org/35062623902.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwezomu/cyrjfJf/semowak.pdfIn PDF document text
    • http://kinokaiff.space/84960708009sz4cd.pdfIn PDF document text
    • http://fastcreditcheck.info/50436944192jlvh5.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
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_9af77e48864c48a0a299998b2810e211.pdf?index=trueIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_f9c32f63ed5c4df0afd81439493f3f08.pdf?index=trueIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_c25ab36db70c4fa083ecfc28ebf7d7c8.pdf?index=trueIn PDF document text
    • http://bidadefaj.epizy.com/78820384595.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_off0000d99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99D 5060 bytes
SHA-256: 303986e33d4dd4746f12473679c775555d310b4a8e824920e29660f65339891b
font_01_sfnt_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 12096 bytes
SHA-256: c784ec59aa6bda9d4a902fd035667e0ab16e4b0df6552e94976260812a1f1984
font_02_sfnt_off000111e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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