Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecf80dcb2ccc745…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 06:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6395c2cd1e774087e20eb86e728177f SHA-1: b9fdc3d5e3648ff0045fa94345268c5ffc85a3e4 SHA-256: 0ecf80dcb2ccc74549c81d573174fe07c4e1ca4a5e19f2e8dfb818827c23c38e
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains an external URI pointing to a suspicious domain. The PDF document body, though heavily obfuscated, appears to be a lure for search engine traffic, directing users to a URL that likely hosts a phishing or malware payload. No scripts were extracted, but the PDF structure and heuristics suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5889

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://maypoin.ru/award?keyword=bartok+romanian+folk+dances+violin+pdf
    • http://hotel-engels.ru/sad_love_story_to_read_in_englishl93ur.pdf
    • https://cdn.sqhk.co/satidaruxami/cQUyhix/116061689.pdf
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/tifasemapufejutipipe.pdf
    • http://kiluzilaw.sportsontheweb.net/examen_toefl_ingles.pdf
    • https://zejinimab.weebly.com/uploads/1/3/1/8/131856072/nigokobakewubuxepez.pdf
    • https://cdn.sqhk.co/rufopunuk/bWhhia7/wutipopagosuxaxivita.pdf
    • https://cdn.sqhk.co/rezeribevi/hcjf4hI/warriors_of_fate_sega_saturn_rom.pdf
    • http://mebevevi.mywebcommunity.org/pentair_ic40_for_sale.pdf
    • http://webmastervlad.ru/471477376811tdr8.pdf
    • https://cdn.sqhk.co/wotirixa/GhgijbP/tegumimigomuju.pdf
    • http://lipuwisapi.mywebcommunity.org/alfabeto_griego_moderno.pdf
    • https://karopokonu.weebly.com/uploads/1/3/4/5/134519394/widax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dd2b1064-365f-4731-9644-83412e6f6186/dream_meaning_of_seeing_apple_pie.pdf
    • https://uploads.strikinglycdn.com/files/40c79613-6cc9-46b6-892f-51bbfcc4fc74/three_prescriptions_for_happiness.pdf
    • http://lebevinawefebo.rf.gd/android_devices_apps.pdf
    • http://popofisofol.myartsonline.com/xuroluneza.pdf
    • http://pekafujojef.onlinewebshop.net/36196986978.pdf
    • http://rolizixi.rf.gd/each_other_one_another_worksheet.pdf
    • http://mibobugaf.rf.gd/how_to_terminate_a_month_to_month_lease_in_georgia.pdf
    • https://uploads.strikinglycdn.com/files/a8bf4189-3877-41e2-bf1a-1bcf4f291d4c/datulowasirobudetunufelad.pdf
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e811.bin
479fcf36898231f8178891f18b3e8099f57fe4399da79b9407144e3accf87472		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 5260 bytes
font_01_sfnt_off0000f9dd.bin
67f64f86656fa3deb465b5d712127f0a7e3034d62900bff23a0197b8c944d686		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DD 13824 bytes
font_02_sfnt_off00012504.bin
3bb08857b08983a257d5a2052628e18542fd51c8d29f5bbef87ea8b8ace00841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12504 16096 bytes

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