Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd881f63293344d…

MALICIOUS

PDF

130.4 KB Created: 2021-05-08 22:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f6b604426e086be85c5f07186e63a5 SHA-1: d970f3a91854e76f4a512a975d8f2cd3c28e5e5e SHA-256: 4dd881f63293344d3805505b969a412ed5bc4e1140e82900519fcf81667c17c1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains text suggesting a lure related to relationship advice, which is a common phishing tactic. The embedded URL points to a suspicious domain, likely serving as the next stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=how+to+get+your+ex+girlfriend+back+book
    • https://cdn-cms.f-static.net/uploads/4467573/normal_605b61af4df33.pdf
    • https://cdn-cms.f-static.net/uploads/4490265/normal_5fd09fb387cd1.pdf
    • https://cdn-cms.f-static.net/uploads/4385197/normal_60344518ef072.pdf
    • http://pobesegu.scienceontheweb.net/how_to_reset_kenmore_washer_machine.pdf
    • https://cdn-cms.f-static.net/uploads/4409095/normal_601b30f36e774.pdf
    • http://tunabamilusi.mypressonline.com/canal_de_aprendizaje_visual.pdf
    • https://cdn-cms.f-static.net/uploads/4426075/normal_605f58eda8818.pdf
    • https://static.s123-cdn-static.com/uploads/4377704/normal_600778c7795cf.pdf
    • http://reactivaperu-viabcpi.com/66355596357zx99v.pdf
    • http://logoped-samara.ru/tidofgnmc9.pdf
    • https://static.s123-cdn-static.com/uploads/4485172/normal_5fef359dbc8ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kurejewupom.rf.gd/cash_flow_statement_in_tally.pdf
    • https://s3.amazonaws.com/leributafa/bogefirudizilizan.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/hp_elitebook_8540p_laptop_specifications.pdf
    • https://s3.amazonaws.com/dejolavubukugeb/nutasonatelav.pdf
    • https://s3.amazonaws.com/gagotaniwipure/1804461248.pdf
    • http://fuwutowamig.myartsonline.com/the_canterbury_tales_nevill_coghill.pdf
    • http://xiniwipilanaju.atwebpages.com/cognitive_advantages_of_bilingualism.pdf
    • http://dirogom.rf.gd/free_ccna_books_for_beginners.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a45c.bin
ca0b240e6903993ea01da21cc0d9c01e125ae8dafae4b8412e7cc0360b76b0dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A45C 5440 bytes
font_01_sfnt_off0001b705.bin
68bbe42c93759ab90c218695aa25c1747b40456063d11b0ac06b51d2514fd3e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B705 1796 bytes
font_02_sfnt_off0001bf90.bin
d856d1f54126144ad79ed3c7bf7f522095f28ec0476485c6ec6ee50a54080aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF90 11140 bytes
font_03_sfnt_off0001e5a9.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5A9 16312 bytes

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