Malicious PDF — malware analysis report

Static analysis result for SHA-256 692f94309749f943…

MALICIOUS

PDF

86.2 KB Created: 2021-03-25 05:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 10a7008a4c242f0af2b58db49252d947 SHA-1: 34caf16ec1c6e5027b6f42784544a24388d3d0c6 SHA-256: 692f94309749f9433baec4101437390fd37d21a9b4970dfa6e0846373dc37626
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 0.9996

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://lozipotod.ru/wix?keyword=syracuse+craigslist+motorcycles PDF link annotation
    • https://mifabawir.weebly.com/uploads/1/3/0/7/130776047/desuvovidupili-totakuxa-nivazalawimezut-baxopowake.pdfIn PDF document text
    • https://suredowatoma.weebly.com/uploads/1/3/4/7/134762200/7172547.pdfIn PDF document text
    • http://gatorama.space/kilokepesufizuranimo9ertd.pdfIn PDF document text
    • http://workbykoder.xyz/epson_printer_not_printing_black_colorzunhp.pdfIn PDF document text
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/c8ee6ae7d77b5.pdfIn PDF document text
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/7dddf46162.pdfIn PDF document text
    • http://snapchat-alert.com/examen_potencias_y_raices_3_eso_aplip5way.pdfIn PDF document text
    • http://mon-cmso.best/simcity_4_deluxe_product_keycrkz0.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/hfifGig/grass_cutting_tools_equipment.pdfIn PDF document text
    • https://cdn.sqhk.co/lumozupa/bjjDrhe/chronic_pain_management_template.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/8hhMkHC/aambala_video_song_isaimini.pdfIn PDF document text
    • https://cdn.sqhk.co/bulenupulabo/dUihJig/81738757729.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/YRfnbha/marketplace_mall_stores_champaign_il.pdfIn PDF document text
    • http://mmeueue.space/65225209029scdeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5d9de69b-f80b-44d6-9c2d-9027806fef0b.filesusr.com/ugd/e26ad2_c9a3cc26d1044eeb9b558a8ea4ff741d.pdf?index=trueIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_4abed5eff5eb4f83adb5373e654b13ed.pdf?index=trueIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_050357aad5504c43b332c8c9f157cfe1.pdf?index=trueIn PDF document text
    • http://kubosew.epizy.com/wulotu.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_c7f4ed226a404f94b8caf5b5b21a63ec.pdf?index=trueIn PDF document text
    • http://dalotatafajadad.epizy.com/bully_lite_apk_data_mod_adreno.pdfIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_99ab5ba62f1d4b1281c39dbab6e884b1.pdf?index=trueIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_a4db362ce236441ba23767dbd30d18f4.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_off0001135f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135F 5324 bytes
SHA-256: 9d2c902ddd138601329c380a45f910589c436bcb4b860323a26b0fb5357e16ce
font_01_sfnt_off0001256b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256B 11200 bytes
SHA-256: 656ef537691c70a0d7ffb1317aa171b16a3650de07139993a4345b14a7bbbc79