Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae12dc1ca6c1a13…

MALICIOUS

PDF

100.6 KB Created: 2021-06-01 12:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 030c7269b7b76ec561e8dad57890d313 SHA-1: 7896618b3c1669f74b911af922db41312ef211eb SHA-256: 0ae12dc1ca6c1a13f7d09fd9d492bf2ff42d83dd4237613c08e5eb88aec4140e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a phishing lure disguised as a search result. The presence of many links on disposable hosting suggests a link farm used for SEO poisoning or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://synerhu.ru/pbw?utm_term=accounting+chapter+6+crossword+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446645/normal_6017566909f11.pdfIn PDF document text
    • https://fuwinusu.weebly.com/uploads/1/3/4/4/134488521/dd547fb26fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_6036cc3f03621.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410004/normal_5fc7f141ea9f1.pdfIn PDF document text
    • https://venefosek.weebly.com/uploads/1/3/1/8/131871910/5b82251b2f1.pdfIn PDF document text
    • https://rirusiwox.weebly.com/uploads/1/3/4/2/134265342/zodisefoseb.pdfIn PDF document text
    • https://fonomekaleguv.weebly.com/uploads/1/3/5/3/135308628/7275874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_60321edac26a8.pdfIn PDF document text
    • https://wopuvonu.weebly.com/uploads/1/3/1/3/131384791/8143101.pdfIn PDF document text
    • https://tulejimukun.weebly.com/uploads/1/3/4/3/134399478/1c4636.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/af246045-eb82-43c3-9a4f-bdefb5df10a1/kukono.pdfIn PDF document text
    • http://dipoziw.pbworks.com/w/file/fetch/144451167/kagat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/312c61c4-76b2-4f17-90dc-bcd5432fbc3c/jurasedofexibumonejimut.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144438489/migefajotinirugurijavub.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/bajobajotoxomuwarewitage.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/jopelivof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b34776-d3ae-4352-a3cd-c332bab7ff15/zokolero.pdfIn PDF document text
    • http://midevodimu.pbworks.com/w/file/fetch/144434391/biblia_de_estudio_del_expositor_jimmy_swaggart_en_espaol_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37976071-8fc5-4411-94a0-5315dcf5d2d5/jufibewabofopetasefukusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9939aa-d7e5-4d47-b329-28222d85329e/the_skeletal_system_answer_key.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/how_to_get_free_bees_in_bee_swarm_simulator_2020.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/manudoxawuwuso.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_off00014d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D69 5540 bytes
SHA-256: d284304fe092c9aa6d976b370706f7c80046dd0cb1c332779450a15523e2be9b
font_01_sfnt_off0001604d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1604D 10848 bytes
SHA-256: bb07f0fc26a6d42a2d46131807cfabd790df1ae1e490b52c1a29a74c5806faaf

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