Malicious PDF — malware analysis report

Static analysis result for SHA-256 5086ff63a1b59778…

MALICIOUS

PDF

79.2 KB Created: 2021-03-25 03:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: eae95eb5df35f44f3d95fc42fe53eef9 SHA-1: 4816cb69f2de98b7ef969c91291902f0aaeeb87c SHA-256: 5086ff63a1b5977863743797e81b13aa96031a983812d7fd4e63f741a989c5fc
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or scam attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to a site that may host further malware or phishing content. No scripts were extracted, but the overall structure and URL distribution are characteristic of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/award?keyword=organic+chemistry+notes+class+11+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377377/normal_603de0f77a2b9.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/heILFDX/tikagekepipikus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_601527dd70330.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479916/normal_5fc5a39baf20e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484103/normal_5fee0b0888960.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/jdFKihb/house_of_fear_surviving_predator_pro_apk.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/psychology_in_your_life_second_edition_apa_citation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_6036fd13cf904.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/bodybuilding_tips.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411683/normal_5fca9d6720c69.pdfIn PDF document text
    • http://texewofe.22web.org/putosuselogezorud.pdfIn PDF document text
    • http://xizugef.medianewsonline.com/applied_spectroscopy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_6046eefa7c093.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/what_was_the_major_reason_for_the_writing_of_the_declaration_of_independence.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/90668288865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_60503d82b48bf.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/jigfigm/69184737970.pdfIn PDF document text
    • http://zokazurimila.mygamesonline.org/adaptive_control_system_book.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
    • http://kivarutumo.myartsonline.com/83137439606.pdfIn PDF document text
    • http://ligekasuxube.onlinewebshop.net/80270236104.pdfIn PDF document text
    • http://wuzukakixete.rf.gd/gosirivulik.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/84230755727.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/314248818.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_off0000e944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE944 5632 bytes
SHA-256: 8f81aad472b86380362b8130dd03d0dd282fc846d4aed2ca9a4674462b092b39
font_01_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 10688 bytes
SHA-256: 7ea1f794cdd33a8e9d8cad701eda2c0cd884e537b74764ded62f5a26fd43dc9f
font_02_sfnt_off000120b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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