Malicious PDF — malware analysis report

Static analysis result for SHA-256 654fe06c2ce675d0…

MALICIOUS

PDF

98.4 KB Created: 2021-01-31 06:22:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 46dfba4623dc11aa5a55a5e3c750be8a SHA-1: 922f828a4f999da1d7c74c0f9202f44700e24fc7 SHA-256: 654fe06c2ce675d0ee45e28e33a244b766c657db64e40bb247b6cd6ef337b173
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies the document's structure as a link farm on disposable hosting, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://baarspo.ru/wb?keyword=my%20little%20talking%20princess%20promenade%20123movies PDF link annotation
    • http://classicalnaturally.com/43772507334c70qj.pdfIn PDF document text
    • http://agencymedia-ig.com/mitefewaluweperj72n.pdfIn PDF document text
    • http://storeplus.pro/warframe_steam_achievements_synce7qfv.pdfIn PDF document text
    • http://wilitubejibo.iblogger.org/42553064418.pdfIn PDF document text
    • http://naturalik.fun/nissan_x_trail_2020_manualqquqg.pdfIn PDF document text
    • http://joy-todays.online/convention_syntec_grille_salairescst5.pdfIn PDF document text
    • http://godevibusaxinoj.22web.org/buchi_rotavapor_r-_124_manual.pdfIn PDF document text
    • http://itgermany.net/macroeconomics_5th_edition_hubbardsrzqj.pdfIn PDF document text
    • http://lnstagrambusiness.com/525421680521yzy5.pdfIn PDF document text
    • http://alex-chekalev.com/cbt_assertiveness_trainingohwma.pdfIn PDF document text
    • http://nesobaka7.xyz/ukulele_4_chords_songsdsmkz.pdfIn PDF document text
    • http://vkrowl.com/evertech_sandbox_gamelzaws.pdfIn PDF document text
    • http://skywonder.space/30724352578rpeuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mewudupite.epizy.com/avg_antivirus_2018_free_with_crack.pdfIn PDF document text
    • http://jalasofumikom.rf.gd/awadhi_cuisine_book.pdfIn PDF document text
    • http://mugekalamiwatek.epizy.com/miracle_crack_2._78_free.pdfIn PDF document text
    • http://zonadomafi.rf.gd/vogutoxox.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_off000138e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E3 5972 bytes
SHA-256: 786321ca2a4c394c6e8823e67c109e6c976ca0faa219d47aa1b63be73bda9545
font_01_sfnt_off00014d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D48 15680 bytes
SHA-256: c4d3c4ec3bc88c1276cd412b6a285edd85388effde6a3bee3cb0cfac4e49523e

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