Malicious PDF — malware analysis report

Static analysis result for SHA-256 570e556e3eb4cf47…

MALICIOUS

PDF

114.6 KB Created: 2021-03-21 12:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e447eac4eb9462b399999556403626 SHA-1: d5fed5ff1ff62357d05f8112828d869bdb6f2028 SHA-256: 570e556e3eb4cf47d76d8b3df3e7001803ede937940d2ed1708a06f4d45cce34
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=bms+performance+careers
    • https://cdn.sqhk.co/lojibuwe/FDgfshi/dinopizezapu.pdf
    • https://cdn-cms.f-static.net/uploads/4392451/normal_60362e791047e.pdf
    • https://cdn.sqhk.co/ditetijesi/genHTid/rimuvizufewegesudesoweku.pdf
    • https://cdn.sqhk.co/runudori/PhhUVjb/2222081199.pdf
    • https://cdn.sqhk.co/wepuvumug/ibgfRif/free_medical_powerpoint_templates_design.pdf
    • https://cdn.sqhk.co/tudenireso/2Jxg1ic/portable_folding_treadmill_reviews.pdf
    • https://cdn.sqhk.co/rotonoba/yhiKChg/jexiraroretojumodatabi.pdf
    • https://cdn.sqhk.co/kitujesijak/aojchdR/food_wars_season_5_episode_12_release_time.pdf
    • https://static.s123-cdn-static.com/uploads/4498868/normal_60048757f3c8e.pdf
    • https://static.s123-cdn-static.com/uploads/4387562/normal_5fee472e793ed.pdf
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5fffdd029deed.pdf
    • https://cdn.sqhk.co/vadetegubufo/yDhcmgh/nolajalarinifadituzinijot.pdf
    • https://cdn.sqhk.co/winogolelog/jfhf2jd/sapopajuzeratukixuwen.pdf
    • https://cdn.sqhk.co/nugilatunu/Vn6Gdih/39903930489.pdf
    • https://cdn-cms.f-static.net/uploads/4383470/normal_604b4712d0f47.pdf
    • https://cdn.sqhk.co/xujurovemu/ajiDYia/3d_crystal_puzzle_castle_instructions_disney.pdf
    • https://cdn.sqhk.co/zuxeromewime/Dbgijd7/gakuv.pdf
    • https://cdn.sqhk.co/zoboxoba/1jb3gfg/vip_access_walmart.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_c83e4ee1cf3d42bb881d52a60c02ef0f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/13dc974f-1ad8-47d5-8f47-3593d46edff7/what_are_the_forgotten_books_of_eden.pdf
    • https://uploads.strikinglycdn.com/files/44746016-8d68-41f8-b7a0-19481a138ed8/77888734346.pdf
    • https://uploads.strikinglycdn.com/files/cc730673-531d-43e7-adb7-0a7e72029179/lasiwosep.pdf
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_391b5ebb18444fe5a172b9d37c230f59.pdf?index=true
    • https://679cd94f-bb1f-411a-9684-d99498fe93d6.filesusr.com/ugd/ce16d4_b599976841c244159a90e083297776c1.pdf?index=true
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_8c07fadafec048cab81781fa62ad9322.pdf?index=true
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_b4802234ecd343d8a4627d8a7d91ca6c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018235.bin
910879b2fe1b6d9293a9e30db0f2b057bb2a4772b17ce6db7f8f1b8352e831c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18235 5176 bytes
font_01_sfnt_off000193bb.bin
cd0f9d1fee268538b82127f245d0dc9be5b57cd1af7447de51968a5aa77d2311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193BB 11560 bytes

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