Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16009aa0e113b4c…

MALICIOUS

PDF

75.4 KB Created: 2021-04-07 19:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c397f54ced5722b2556e577966e0e7f4 SHA-1: 0c23d19b65eb0c244d397ee78c0eea62b7347c6f SHA-256: d16009aa0e113b4c1919d28ba166cbf681f62b3bb14f8536c80a6185fd5f4d80
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The presence of a 'Download Now' lure further supports this. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a lure to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=tekken+3+game+free++apunkagames PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384655/normal_5ff01224680fe.pdfIn PDF document text
    • http://beremoter.online/measuring_angles_in_2d_shapes_worksheetsvocn9.pdfIn PDF document text
    • http://japisonaxem.22web.org/56787093877.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/bOhhZjb/67401831171.pdfIn PDF document text
    • http://xiwikene.iblogger.org/38425732881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_60388c72e7244.pdfIn PDF document text
    • http://marketeuro.pro/earl_of_sandwich_locations_las_vegas0x6ot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_603bd59ab0001.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/sjggigi/zawiruniraseteju.pdfIn PDF document text
    • http://zawazubiwezug.iblogger.org/carcinoma_espinocelular_oral.pdfIn PDF document text
    • http://xajoboki.iblogger.org/garmin_nuvi_2689_mount.pdfIn PDF document text
    • http://luchdobro.site/microsoft_project_online_professional_costcdaw1.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/jugjjid/mupaxizirikowapinof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381546/normal_5fcc210b0c18e.pdfIn PDF document text
    • https://cdn.sqhk.co/xapanularopu/AaAFhiW/36430336579.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lososimap/android_tv_vs_smart_tv_bagus_mana.pdfIn PDF document text
    • http://nimezidudixo.epizy.com/78086150873.pdfIn PDF document text
    • http://sivopob.epizy.com/ct_ghp_trong.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/android_one_moto_x4_screen_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/tukexeweze.pdfIn PDF document text
    • http://nomijedelalevi.rf.gd/feneguvixudow.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/omegle_video_call_apk.pdfIn PDF document text
    • http://wuzatefiroko.epizy.com/alphabetical_list_of_calories_in_food.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/flashback_delay_toneprint_editor.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_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 5364 bytes
SHA-256: 2d060a6722546440526147c59ba58f04d0ef87f2648b662a477844bafe276070
font_01_sfnt_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 11052 bytes
SHA-256: 70637e1bac7a6c0c432d052ff4866e9d28d596b213e2e8913c177733924056a2

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