Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b46c4355be3d48…

MALICIOUS

PDF

89.6 KB Created: 2021-04-14 11:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 04634d6e669ec405272321bdced9dbd4 SHA-1: df3189a5e2f74af4c90f8d02667829a54b0085ce SHA-256: 14b46c4355be3d489ad6d14f4ed6590e1287a875c14fe5f4597ed3dbfd3c7467
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://lozipotod.ru/strik?utm_term=setup+maven+home+in+intellij PDF link annotation
    • https://cdn.sqhk.co/dinigivo/njbjeaQ/69213262225.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/iejhjdJ/86904237444.pdfIn PDF document text
    • https://cdn.sqhk.co/gasidonoda/pROdjYT/badshah_full_movie_hd_free.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/0Eaheig/84583616865.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/sjfhaUJ/70209641091.pdfIn PDF document text
    • http://afracheat2.xyz/810230684241wcq5.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/juKxigf/vancity_coin_counting_machine_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/BxHhdw1/ninja_turtles_legends_game_data_file.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/hhhj3ic/bajikeregekilokane.pdfIn PDF document text
    • http://mexicotop3.xyz/wheres_waldo_3000_piece_puzzle_pictureucjg0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454679/normal_5fec44db8f2b4.pdfIn PDF document text
    • http://autokenn.com/photoshop_cs6_free_filehippo8trpx.pdfIn PDF document text
    • https://cdn.sqhk.co/todiwapubu/XghrmyE/hoi4_field_marshal_guide.pdfIn PDF document text
    • http://uscarinsurance.info/fojumaravawut0ds6j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_5fd2e6d6744a1.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/Ejijhhc/download_game_piano_tiles_bts_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fujalaliwedav.epizy.com/duzopinarazusuzivuj.pdfIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_129920b2fb7c4fbbaab14f0700dd26db.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_c2602b81bf7747cca409ad2b03aeeb8d.pdf?index=trueIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_91281a255c304722aff890e32b35fcce.pdf?index=trueIn PDF document text
    • http://vepisokizapam.epizy.com/eu_annexure_15.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_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 5024 bytes
SHA-256: 18bf28956d4e164e26ed89f7422fe4b9a97206a721a60a10b89a0c53c0b662a3
font_01_sfnt_off00013119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13119 11840 bytes
SHA-256: 0c4299ef21e597f333a69fba53767a1c7edc62e57a0fef6c7221e5d402d6a93b