Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc602f2413137f4…

MALICIOUS

PDF

71.0 KB Created: 2021-03-09 13:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 884441a8a7fa8a89fc3cc2fbda370ed8 SHA-1: db1cebaea2ae7cdb8912c763a3187b4eb5393402 SHA-256: 0cc602f2413137f4c55ac728e7a3baeb2ea0de00b3bbe8e73acf56a831a0d283
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • 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 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://leonvi.ru/strik?utm_term=virginia+woolf+books+crossword+clue PDF link annotation
    • https://cdn.sqhk.co/mopomotop/idjdHnB/jowomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465128/normal_6018e926d1b6f.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/Uiju6id/map_bedwars_minecraft_ps4.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/nuribulukile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_603ff584b2ef5.pdfIn PDF document text
    • http://varnisvakq.ru/32287938645oarwd.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/hp_psc_1315_cartridge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_6010b6d2367cb.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/41320853429.pdfIn PDF document text
    • http://startask.ru/hp_probook_6550b_drivers_for_windows_7_64_bithakef.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/3eed1004-d8e6-4668-ad15-c9ab32f87736/nunumegiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bdd4fcd-2a7a-4252-ab75-9a372b5efa75/fekosixenubawepumogef.pdfIn PDF document text
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_4051c0b9c05145cb91f4801ecee84f35.pdf?index=trueIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_fccd16e833c8497db623c96112f21334.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/209dd540-4460-4e73-9207-263f0c71fef1/shepherd_the_flock_bible_verse.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_1fbc24d549e84b9b8d7441865557c649.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf93f5b-ab51-4601-bbf4-945285016912/20286119163.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA3 5252 bytes
SHA-256: a27d4d63dc89e971fb3a85470976282dfcf6d4f8e427a951b2b3648b08042083
font_01_sfnt_off0000de91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 9992 bytes
SHA-256: 020dc49ab1d50ea234b0d32f69b948612b654a61c9af7e8df31ab2efbf26f531
font_02_sfnt_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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