Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f061943c9bf68e2…

MALICIOUS

PDF

89.9 KB Created: 2021-05-20 03:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d4a532c02bf72fe36bb894dcac3d65fb SHA-1: 2d794ec69b37eb3002c7e7fc76d953cd116f00d8 SHA-256: 4f061943c9bf68e2089a921b6857ad9b1cdeec361ab020f56d5361d9e3e73969
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that points to a suspicious domain, likely serving as a lure for users. The document body, though heavily garbled, suggests a religious text theme, which is a common social engineering tactic. No scripts were extracted, but the presence of an external URI and the overall malicious verdict strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=el+evangelio+de+santo+tom%25C3%25A1s+completo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489028/normal_605818ee5a2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474719/normal_604413ae7cabb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401559/normal_6016499379a11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_601e7046c1494.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fca08af44d03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455377/normal_600038f535ed4.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/974e7205-7e0e-4747-b7bf-b6f07918b343/53748211406.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/57155105650.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/medical_doctor_letterhead_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ba4528-0a87-4cba-a584-599243660dc5/44475833397.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/dymo_labelwriter_450_turbo_printer_not_connected.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/akmu_winter_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd38e61-ab4c-4b2d-94ed-0beb2175944c/case_study_phd_proposal.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/tawigasiragibalunetoditem.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/18808165809.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/bambi_song_lyrics_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/fairy_tales_storybook_cosmetics_little_red_riding_hood.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/70665399586.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/centre_de_formation_agent_d_escale_bordeaux.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/16107460141.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/79903396433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1be2067-0350-48b2-91df-a8a70bf1c239/black_and_decker_edge_hog_repair.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_off00011ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF8 5548 bytes
SHA-256: 471083e7f0f85c293dcef406b994fd478c4adfb1cda51de9ad7ef41b0cced226
font_01_sfnt_off0001314c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314C 12024 bytes
SHA-256: 4abfb5d702ea7dd8e65d026f8acd601a3522e8fdf55f46216a8ca28503182f2c

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