Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ab06907611f95d…

MALICIOUS

PDF

71.3 KB Created: 2021-04-12 15:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c08c2467d3f90b0b35e364152e12395f SHA-1: 8f56e187b907354adad9381092f8f67e6c8e537b SHA-256: 72ab06907611f95d93f910f64bcfd51e7b4f291a55f028c0680966a40c273606
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The presence of PRC/3D content and ML classification further support malicious intent. The primary URL, https://xajibur.ru/strik, suggests a redirection or tracking mechanism, likely leading to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://xajibur.ru/strik?utm_term=harman+accentra+combustion+blower+replacement PDF link annotation
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/dbef5a7ab4.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/tudin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381544/normal_5feb6c5b5d283.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/calendario_agricoltura_biodinamica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450338/normal_603457364f266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403537/normal_60088c6446ff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456119/normal_60683191cd6a0.pdfIn PDF document text
    • http://thehensleys.org/65853292686pvbfo.pdfIn PDF document text
    • https://teditiwos.weebly.com/uploads/1/3/2/6/132681477/pesorupar-tokobebujij.pdfIn PDF document text
    • https://fubiliretule.weebly.com/uploads/1/3/4/4/134489125/f714b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_603a0b60a57b6.pdfIn PDF document text
    • http://keepsufi.space/61025145483muv05.pdfIn PDF document text
    • http://pubggaming.online/need_for_speed_rivals_ps4_multiplayeropxxj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468831/normal_6038747c33d3a.pdfIn PDF document text
    • http://axacheat4.xyz/frigidaire_ultra_quiet_iii_wont_draint0kjd.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/8131e54d-98f1-42e4-807c-2f57c7442fdd/how_do_you_scan_on_a_hp_deskjet_2541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a732f2c3-820a-446c-909c-167f2b50b1a2/mapalen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854e3c8f-07a8-40d5-a47f-d0c2ecbbcf3f/79221097439.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/biochemistry_mbbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ea5cea-12b6-4e41-b403-22ffeb7eb435/suncast_hydro_powered_hose_reel_costco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7d8d3d-0550-4f71-a088-fd92b83eb045/best_calligraphy_learning_book.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_off0000d7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F3 5272 bytes
SHA-256: 96e1192812401d5ed1ff0debfdb148d8ff44c0caa34ee7cef5b3ced7c25e80b9
font_01_sfnt_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 11168 bytes
SHA-256: 625bdc13b42169b85c43f2cab87b56f0c7566a1426d90d13851c7707acff31eb

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