Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf686da5896c36f…

MALICIOUS

PDF

77.9 KB Created: 2021-03-08 19:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d90108e799a454c12b288ab198dc058b SHA-1: bbd69b750f0de2fe664df7f7975eedde5e1dab94 SHA-256: baf686da5896c36fca43fdfe93ab6ef8c966fb1421eb04211cfa13acb0433b56
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one that appears to be a search result lure for a specific product. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or to serve a secondary payload. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://gimoguvi.ru/award?keyword=bosch+accelerator+pedal+position+sensor+pdf PDF link annotation
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/mulivobowebizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_601db5e57276e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445735/normal_60438dedcc6ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5ffa25b752f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464314/normal_602c593a63d0b.pdfIn PDF document text
    • https://tugunopoxakisif.weebly.com/uploads/1/3/1/3/131398472/guvipofipukiwal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414360/normal_60006bc541888.pdfIn PDF document text
    • https://rinuvimasajef.weebly.com/uploads/1/3/2/6/132695862/4084087.pdfIn PDF document text
    • https://puzejiwitamino.weebly.com/uploads/1/3/1/4/131453698/komivesodivu.pdfIn PDF document text
    • https://gejerirun.weebly.com/uploads/1/3/5/3/135312822/7587556.pdfIn PDF document text
    • https://zegejuxinubu.weebly.com/uploads/1/3/4/7/134730654/6283a.pdfIn PDF document text
    • https://makifilibavik.weebly.com/uploads/1/3/5/3/135383918/viliwesoxojaxipi.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/Llidnih/bandicam_mac_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/givikofuf/diatrid/heart_rate_monitor_pulse_checker_bpm_tracker.pdfIn PDF document text
    • https://cdn.sqhk.co/naruxibe/3giihfT/lapel.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/e7f0e625-382a-4e62-be3b-16fc638fffcf/minanofatu.pdfIn PDF document text
    • http://winuzuvejifod.epizy.com/24517818967.pdfIn PDF document text
    • http://wuxodevidupibe.epizy.com/74087136333.pdfIn PDF document text
    • http://patuwovoparivi.rf.gd/pukajafinukaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b946658-a29a-4618-aadf-aae1892beead/xinokodurorizaserovum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b0769c-8e2b-4c81-8a5c-0f4ac100f4b2/7927740030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7448fab4-947a-457f-b326-c8bbaccb3bc5/beats_studio_3_price_in_india.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_off0000ea69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA69 5292 bytes
SHA-256: 75b290fc4627ce30e3aada4fecfff814307463d147eb8d9a06dd7b09a421f49e
font_01_sfnt_off0000fc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC67 14768 bytes
SHA-256: 0fbe21f845a6cb370f12e30226897df3ee40cc2c193c2009961e986d00ffc365

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