Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f35e887f6f12d6…

MALICIOUS

PDF

68.9 KB Created: 2021-01-01 10:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fc925e76153629f9645a18a57dcb0663 SHA-1: 5582b080805382c03117d92fa0c1dc10feda6314 SHA-256: a7f35e887f6f12d6019b208aba07845d05421e6ce1fbca527d0049580d1d0ca9
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. An external URI pointing to 'trafficel.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, but no clear textual lure.

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
  • 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://trafficel.ru/123?utm_term=bell+cafe+racer+helmet PDF link annotation
    • https://cdn.sqhk.co/kewudomavave/ijYjajf/classroom_management_plan_middle_school_example.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457302/normal_5fcd33f905f49.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/Yq1qcwB/24004928388.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/hgvI2sC/pacify_her_slowed_down.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/Srn5rMd/3d_origami_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/Ekjficj/37569598917.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/39649e02-0212-4c8a-9c8c-7458162e494b/wexok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da68de0d-e3ec-4e06-a532-6171bd57c2fa/talavomup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90159db3-e811-45b4-bc77-d6e53dbf454e/76518957092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db65e8d-f102-4031-b6dd-0a5d2d6aeaf8/toduxugezexanudu.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/vista_sp1_64.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f521053-7ace-4bd4-950c-1976d67c7823/nuwesiwodemujubez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a148101-4129-4e26-af46-fb2d1753f191/45868977727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fccd8120-d1b8-464e-9ad1-293d7de3d290/high_yield_behavioral_science.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_off0000d18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18D 4992 bytes
SHA-256: e8f1a7a8ffa35d7b8018c3ea3da3bfbeea8906cd7235d9ab28b7e2101d4b5320
font_01_sfnt_off0000e262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 10712 bytes
SHA-256: 7051be1c29073b995dfa0ec3b1907e2678a9640635fde8e13d49eb3cc579338a

Open this report in the interactive analyzer, or submit your own file for analysis.