Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afb0667b86e358d…

MALICIOUS

PDF

74.1 KB Created: 2021-05-21 01:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 42a29d85fcbb755fe8fbb7a17010754f SHA-1: 7a9675bf43a8503acf5cf6f30dd78e6e716645b9 SHA-256: 4afb0667b86e358d813bcf9866ec4c768db3a211bfb851901a2e272ce301c7c6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure for a Bible study PDF, directing the user to the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://golowaki.ru/strik?utm_term=galatians+inductive+bible+study+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374175/normal_6035e19c722e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_6027df23563d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_604f43492a412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413585/normal_6046d22fbde05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5fd67ffe5eed9.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/590dda2f-c5d0-42c1-b891-77aa31800696/peavey_classic_30_tube_amp_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc96b05-c78f-469e-9041-699023c65ddd/19303379765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3890c165-d6ba-4752-a397-f304c0d50ec2/realtek_audio_driver_for_windows_xp_sp2_free_download_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad509776-dcfb-4eaf-b13b-98355640db2b/41977765304.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/9game_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06ddc7f-5192-4a43-ab48-e084e0113d7f/23832511947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2899f221-a969-4896-9927-83a9635be93b/my_mtd_lawn_mower_wont_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52fef686-1e42-4662-816e-8abafc60cc72/how_to_set_casio_vibration_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc89476-a356-4697-b898-fa29e8931b9e/taotao_150cc_scooter_exhaust.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c60a211-712c-4f32-9e48-7c1543b36597/zelefin.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/92891629037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd795ec3-7fb1-4ab3-b6dd-0685951b7ecf/how_to_build_a_fly_tying_desk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becc0ba9-7047-42fc-91b9-0350a3400260/essential_elements_ukulele_book_1.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_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 5388 bytes
SHA-256: f9da12000af2c9eb1372d5de1cf572dac96d223d26d4735f04763435428e5342
font_01_sfnt_off0000f516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF516 10844 bytes
SHA-256: 500436d362bd3ad2be3e0dd3416930f39c924a3b095059b42858af3569e927fa

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