Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0be80034095ee16…

MALICIOUS

PDF

69.6 KB Created: 2021-03-25 08:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8347b81c588891f928a8b21fb5c001a9 SHA-1: 6f462d38fd19cf8997189bdababa729f05291bdf SHA-256: a0be80034095ee16a9c5bca62bb089373857d6c46cd6d480cccf265931858b52
154 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. It uses a callback-phone (TOAD) lure and an invoice-themed lure. 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 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://botokaw.ru/award?keyword=ravenol+atf+dexron+iii+h+pdf PDF link annotation
    • http://liketime.fun/old_tappan_gas_stove_parts48nbb.pdfIn PDF document text
    • http://eglo.club/cen_tech_scanner0su0k.pdfIn PDF document text
    • http://pitushok.fun/55300488442qolsy.pdfIn PDF document text
    • http://graatorama.fun/how_to_pick_butter_lettucetj0rm.pdfIn PDF document text
    • http://upgrade4me.com/mouvement_hlicodal_exercice_corrigr44qb.pdfIn PDF document text
    • http://itrom.fun/how_to_use_krups_waffle_makere2dz7.pdfIn PDF document text
    • http://autobuff.xyz/formula_1_2020_ps4_pre_ordery9reb.pdfIn PDF document text
    • http://orehi-siberian-force.online/beats_by_dre_powerbeats_pro_vs_airpods_proz9dfq.pdfIn PDF document text
    • http://tehnotop.site/lajamomqkip4.pdfIn PDF document text
    • http://frasqen.online/dometic_sunchaser_awning_parts_listkgq7w.pdfIn PDF document text
    • http://prizinsta.site/edit_text_in_acrobat_x_prozs607.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/78561527647.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/xewuxixajebotugepuditopo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3959eb3-51af-4b4a-bcf0-ca4aa0894bfc/67844734537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ceaba1-f162-44de-a4d7-38597afc817a/kenmore_500_dryer_not_drying.pdfIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/trastornos_alimentarios_en_los_adolescentes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c4869e-c911-4bd7-bc1d-2bd621f9356a/lawadoxuromosuwamozana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7d6150-b3e4-4555-80e6-e20ffba0f7d3/7225217723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71d85d3-cf71-4137-ba91-81604f544171/93579700867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b998c7c-9b87-4980-8993-51e921a3c7d8/good_warm_up_exercises_for_seniors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c160567-e012-4666-828c-c75a861b12bb/79587780592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d81b5c1-6634-413b-b9fa-66cd33a1503a/majemowepiwaja.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29F 5084 bytes
SHA-256: ddd649641cf1fa910ec38585b8707b709fff05660234f5a8d30035f97d54f4b9
font_01_sfnt_off0000e3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 10588 bytes
SHA-256: f260e1d8f3d61761523f40a32bce0ede4e75e38f843a35ab2ab55bd1358271ee