Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3aae12fc8d85056…

MALICIOUS

PDF

67.0 KB Created: 2021-04-05 14:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: abe7616eb771c1ae9303bdd9d4ade7bf SHA-1: af375bde2eb115811d8392323b41465138e1f3a2 SHA-256: a3aae12fc8d85056b4c623e15f2e8eb4ece8baaf71b97f7c6b504b8a43494e97
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.8918

Heuristics 4

  • 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
  • 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://midufefew.ru/strik?utm_term=howard+miller+pendulum+wall+clock+instructions PDF link annotation
    • http://item-mask.top/multi_point_cutting_tool_nomenclature4um4x.pdfIn PDF document text
    • http://smm-target.ru/misunawuwisidaragafo7h5ud.pdfIn PDF document text
    • http://thedefenseforge.com/how_to_use_shark_professional_steam_pocket_mopgbawq.pdfIn PDF document text
    • http://creditscorehelp.info/pebuluforudszqxr.pdfIn PDF document text
    • http://securityverifiedservices.com/commander_deck_rules_magic_the_gatheringv9yb0.pdfIn PDF document text
    • http://dfds.in/que_es_el_equipo_de_computoeqt7q.pdfIn PDF document text
    • http://shopyou.online/rumiler0t57u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botusomiwa.epizy.com/13507177242.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/99042649380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18d9568-8363-4b8d-999b-8d4c7d4264c3/jeux_de_carte_le_spider_solitaire_gratuit.pdfIn PDF document text
    • http://daxafedijumexir.rf.gd/rokil.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/visiting_card_psd_format.pdfIn PDF document text
    • http://kopididutal.epizy.com/35890694886.pdfIn PDF document text
    • http://wosekamilos.epizy.com/94514962333.pdfIn PDF document text
    • http://tazolupiviroliz.epizy.com/aachen_travel_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8b5b40-fecd-4234-8876-c46886d195be/do_horses_die_from_broken_legs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3684ed43-2005-4559-8960-0fb10ea98c6e/kenmore_elite_steam_dryer_not_heating.pdfIn PDF document text
    • http://ravuwuvilusu.epizy.com/89928909742.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/vedic_astrology_apps_for_android.pdfIn 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_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 5336 bytes
SHA-256: cad964f63ebd2a1cfe091dd4e4f20efd479b9bab5a6c1f16e158734eca0405b2
font_01_sfnt_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 11152 bytes
SHA-256: 873df976045f12b2469c231d37a6537c7758a864187535df125e6169f1e25f37

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