Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b7956ab09734a4…

MALICIOUS

PDF

72.7 KB Created: 2021-02-08 05:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 60ab984a8240c3df1026d053d00b10e1 SHA-1: 72a55b4f4bf831d4a70153e9dd30d1e2ebe919d6 SHA-256: 03b7956ab09734a468f7f3b8a74847e23abe63a7b85d2bf0407d6c4d44cdf101
166 Risk Score

Malware Insights

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

The PDF contains numerous links to other PDFs, many hosted on disposable domains, indicating a link farm designed to obscure the ultimate destination. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the intent is to trick users into downloading a password-protected archive, a common tactic to evade gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/123?utm_term=empath+101+pdf PDF link annotation
    • http://shopsupergood.site/passcode_lock_screen_wallpaper_apppwqnz.pdfIn PDF document text
    • http://todayit.pro/converter_em_word_e_excel7ipht.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/0gDhjyp/download_zarchiver_mod_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/BYahOii/zademagame.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/2jhjggj/38857551320.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/39120719169l03ye.pdfIn PDF document text
    • http://1xbets-regs.site/ditefafagotoguzupusoz9h5nm.pdfIn PDF document text
    • http://my-credit.info/romabi9crr.pdfIn PDF document text
    • http://itagreen.fun/how_r_u_feeling_answerezfg8.pdfIn PDF document text
    • http://mnclassis.org/sivelonuruput5sy36.pdfIn PDF document text
    • http://terem.space/pixel_art_candy_color_by_number_onlinedf6m4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujozovasa.rf.gd/bts_fake_love_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/tukusifetunowuwolaxulakoz.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/partnership_contract_template_word.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_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 5128 bytes
SHA-256: f06f93a25e4367aaa72535ff3d6f0a9e7ce045d85cc070bea1ccaa87e2efabc6
font_01_sfnt_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 10048 bytes
SHA-256: 56eec7d3c3be6bfb617ed491faf970bc7413a2dad8c1d04c301bbb9f5fb89b4f

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