Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1bcfa8e1d8e04a…

MALICIOUS

PDF

67.7 KB Created: 2020-12-28 05:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 996ff6ea607480630ca1e0799805d0b8 SHA-1: f169ba6724afaa320148dd8063b7e22a3ec89a06 SHA-256: 0a1bcfa8e1d8e04addecfe35099fb2df641aeae3dcf57c52741ede08d3817317
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/aws?utm_term=french+body+parts+worksheet+free In PDF document text
    • https://cdn.sqhk.co/simirides/bjaZjh3/betuvalovetedobozesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470218/normal_5fb5801da8f3a.pdfIn PDF document text
    • https://cdn.sqhk.co/navezige/MzgjYgx/different_notification_sounds_for_different_apps_pixel_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f98f1c36cd8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5fc9d1dc5e545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f8ab08c68c92.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/ZjeijEX/97463039375.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/6a251eb8-b73a-4e30-a5d2-dc86b9e7beac/66715815817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e7e1349-7e29-42de-86aa-b3a718337171/32466161903.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/47376452246.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/one_t_draw_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/catharsis_in_oedipus_rex.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_off0000cc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC10 5564 bytes
SHA-256: 01b002c98ccac49b5b0438c89f31332d0bac825ae840df4fef8f7b7bbf6d32a2
font_01_sfnt_off0000df0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0A 10520 bytes
SHA-256: 182d5e659b5370a6069dc3a0eca5c7a383e28eb9148c00baeddb7985c33a8cc7