Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74d9888cde6b95d…

MALICIOUS

PDF

90.0 KB Created: 2021-06-14 10:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e88f8902df2a6ebfbdc334354f65076c SHA-1: ee2de08b94ea629041a50cd45f811419e52503ad SHA-256: c74d9888cde6b95daf8f065fce15c15202020eedb6b10656a17749cc06d54908
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9980

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://philabc.ru/pbw?utm_term=cloud+gaming+mod+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501214/normal_600f1f4f2934a.pdfIn PDF document text
    • https://zugatuwedi.weebly.com/uploads/1/3/0/8/130874050/wujiwilimokape_totuf_sedotamokegabe.pdfIn PDF document text
    • https://wadidomewagu.weebly.com/uploads/1/3/2/6/132681938/mifodelofolatotowolu.pdfIn PDF document text
    • https://turezizudowan.weebly.com/uploads/1/3/1/6/131606253/susugokoladarur.pdfIn PDF document text
    • https://tuvunexe.weebly.com/uploads/1/3/4/3/134327091/jimetaj.pdfIn PDF document text
    • https://faperusa.weebly.com/uploads/1/3/1/4/131454178/vitunosanu_rozekesapila_subinukifumewew.pdfIn PDF document text
    • https://jikajulimag.weebly.com/uploads/1/3/4/3/134319013/pidodob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470836/normal_5fc752a5ba0fc.pdfIn PDF document text
    • https://pamikiwod.weebly.com/uploads/1/3/4/3/134315686/xoziko_nifif_fulujisopilijis.pdfIn PDF document text
    • https://gerikolobel.weebly.com/uploads/1/3/1/3/131398187/netuboduwi_wawovabuxeki_josiruwuz_fufokuniwusixu.pdfIn PDF document text
    • https://vovowiki.weebly.com/uploads/1/3/2/3/132303124/ximiga_miwikazaxiluza.pdfIn PDF document text
    • https://mipumitazolepi.weebly.com/uploads/1/3/4/4/134495795/81213.pdfIn PDF document text
    • https://rikuwizixa.weebly.com/uploads/1/3/4/6/134685427/32a9c6c.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://uploads.strikinglycdn.com/files/f284c90e-f88c-46e8-bab5-c110c53a3997/the_art_of_racing_in_the_rain_dvd_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1988da4-24e2-41e9-b14f-d654ff08cda0/pafepidikisarumivafiran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081c61c4-87d5-443e-8fec-f21591abef58/bilemigipufutovubefevejak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f4f07e-986a-4eac-a266-4cb4b42cb652/litumukesorudaxaxexejelig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9fafa14-fb7b-419a-95e4-235161f8e6f6/mogete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1256d259-6b47-48f1-a15f-0562d445b81a/berger_reloading_data_223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb4ad51-1074-4b43-b2a1-9b89afd3b3a1/glock_19_gen_4_vs_gen_5_trigger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5baad282-b76e-4a3f-bfc3-610a6b05ddca/94282794388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81cfdf9c-7961-4934-b82e-9dd8db3c86e2/nixon_the_player_watch_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02581984-2d25-4b6f-90c6-424dafec5f35/49516543410.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 4768 bytes
SHA-256: 0f8aceac23679686319f759f6b81e77f62a7da10460cec6c4f0fa8bf14be7d57
font_01_sfnt_off0000f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 4868 bytes
SHA-256: f7d52e80289e173f396a101d66fc8bb4e830d64df8aaa145430e5c77166835ac
font_02_sfnt_off00010164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10164 18816 bytes
SHA-256: 4c2ee624849bf557e862bda64bed192a5af3e2c16a941f4008cd8be06347bbf7
font_03_sfnt_off00013373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13373 16496 bytes
SHA-256: 058dc81fb84f3c59c54ff3d9bbb7e8df012fd33d4e10abf6c1a1f883dcd7b980
font_04_sfnt_off00014a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A12 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3