Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1f9bd245e0d101…

MALICIOUS

PDF

77.7 KB Created: 2021-03-05 07:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: aa759f08108477762561b028bb8fc690 SHA-1: 4f2929683d67cba5bba171b19a1582c5cc7b653e SHA-256: 0c1f9bd245e0d10151c531872c0f18998c8d0664823a80f7a82bc226a48bd368
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, which is characteristic of SEO link farms or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and numerous URLs suggest the document is designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/123?utm_term=beats+solo+pro+wireless+headphones+price PDF link annotation
    • https://cdn.sqhk.co/notenirikev/5jcyjgt/ordinal_data_types_in_ada_are_called.pdfIn PDF document text
    • http://guwelureg.22web.org/how_to_install_oracle_sql_developer_on_mac_os_x.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/4922477.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/luvibuwidetevik-janugajolu-demadajaputix.pdfIn PDF document text
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/zixitowe_gavilavusoja_tebakifiridudux.pdfIn PDF document text
    • https://tanibabinilez.weebly.com/uploads/1/3/4/0/134018029/liruvuputu_mokirexuli_gajukadofafime.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/3584692.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/ihj0Eif/figaxuzemibunurefiza.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/dhbttjg/23763184313.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/wvhgbos/listen_to_anime_music_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/gihJs0k/the_expanse_season_3_episode_6_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/9666252315.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_a6408125e0fa4541b233ff6ede1087a5.pdf?index=trueIn PDF document text
    • http://juvikavirilija.rf.gd/refumixozevidoketi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518daaf7-2db9-4ae0-adc9-b9182d1ad4ef/59950647387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d097c8-6a99-4385-b7e3-2b9c5edf80f5/dnd_5e_critical_hit_attack.pdfIn PDF document text
    • http://xafofeb.epizy.com/bleacher_report_smackdown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2293f6-c73e-40f7-b4e0-9f39d92357c8/roxafowobipomibojijezup.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/wawepujitakapofituwen.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_2913b6c1fb6e45fc96ef41956d87dc3a.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_f082fa88119f4f048de659b89e331371.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d885fd-ad25-4e6a-bd2b-01c51d4e8d3b/mimif.pdfIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_b9222a32c90e4b238026e512f7cc21f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/432d8443-1358-45aa-8e2b-8836b1106d38/how_to_get_an_international_drivers_license_in_maryland.pdfIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_76491d6308284af59161cac93a43ec20.pdf?index=trueIn 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_off0000f248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 5300 bytes
SHA-256: ba202da179455660cecfc14dd6b5570df4c7546cbaa496153489f54002e543b9
font_01_sfnt_off0001045b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045B 10688 bytes
SHA-256: 8a0f6cb2d501bc6e248ef07eef24cb3ad27a1888743e2882aed2850240c9e803