Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07392c07abef351…

MALICIOUS

PDF

94.8 KB Created: 2021-03-16 09:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e8678fa68d142e027c74d683d42fd57 SHA-1: e3b46d7ccf32eae13d8256d94628b2d0bdb2f76b SHA-256: c07392c07abef351819390d38a4addf0918c79af26c83250e27d8b3827653f4f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'ponafet.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to educational materials, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/award?keyword=mathematical+reasoning+notes+for+jee+mains+pdf
    • https://lizodeva.weebly.com/uploads/1/3/5/3/135342900/5801170.pdf
    • https://cdn.sqhk.co/libegavezu/uFHhbid/62554582543.pdf
    • https://cdn.sqhk.co/detokelixipi/FBgi66m/autoresponder_whatsapp_apk_full.pdf
    • https://viwezoluzuwa.weebly.com/uploads/1/3/4/4/134401695/rusipowedo_pifubamene.pdf
    • https://cdn.sqhk.co/retepisej/6ieid9L/bootstrap_4_template_for_tutorial_website.pdf
    • https://voveledekama.weebly.com/uploads/1/3/4/6/134684263/f1472dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4314ab03-2a5a-4182-8319-5feb4af69ed0/scary_stories_to_tell_in_the_dark_streaming_free.pdf
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_02f4a7ab5fe54a8b9339d1737a2c255b.pdf?index=true
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_bf9958d3bfa24ebab449dc81697f735c.pdf?index=true
    • https://s3.amazonaws.com/nijudow/witobowifides.pdf
    • https://uploads.strikinglycdn.com/files/b56a4d34-54f8-4709-b5a8-e759432fe9d0/6138768630.pdf
    • https://s3.amazonaws.com/xuvamuba/18461594835.pdf
    • https://s3.amazonaws.com/jajuzasalikirut/veguwezugebapu.pdf
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_6eae551f63874077afeac71d4535b111.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4f55bbb0-6fb4-4d56-afbe-3c42bf53e146/how_to_describe_an_autistic_child.pdf
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_d5d6bcffdd9f4b0c874f77e71e92d6f7.pdf?index=true
    • https://s3.amazonaws.com/sewamos/jifibawotefelepilapaz.pdf
    • https://316b94d8-f1eb-4552-9621-e6dada6029ed.filesusr.com/ugd/4b675a_734b3fc5b83645d28cd7ce089afe4dab.pdf?index=true
    • https://uploads.strikinglycdn.com/files/93eccf8f-410c-42a4-8904-c7d1c986e6db/dewalt_pressure_washer_surface_cleaner_lowes.pdf
    • https://s3.amazonaws.com/ronatiduzoxij/premam_telugu_movie_video_songs_1080p.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b31.bin
7bce255797ef1586ce1c1ac9c2a3a13b5c9eadcee041a3cf558924c494142782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B31 5652 bytes
font_01_sfnt_off00012e4d.bin
5951cd8b3bf476e1b898a6709148e9268121fa18cdbf49f9cc5d2fef29da9def		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4D 11756 bytes
font_02_sfnt_off0001568f.bin
062f5c41d719b052c7d70832df51414125217531d71d137050e2167e33275c99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1568F 16624 bytes

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