Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce79fc4ec5f9b9d3…

MALICIOUS

PDF

76.1 KB Created: 2021-03-26 08:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: df84e6c230b1cf76a324ec57ec28fdea SHA-1: 7db7c330d6eb68c51be98694e6cdb93e843ef036 SHA-256: ce79fc4ec5f9b9d32de2dcae23cfae9cd5293b98fd29712cfa9b06d27830e9dc
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'baarspo.ru', which is suspicious and likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'crochet patterns PDF'. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URL.

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://baarspo.ru/award?keyword=basic+crochet+patterns+pdf PDF link annotation
    • http://watercart.ru/pesatogesado7f354.pdfIn PDF document text
    • http://hookup666.site/game_of_thrones_last_book_release_dateszb9a.pdfIn PDF document text
    • http://bonboxstudio.com/32533152114bsjfa.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/ICFhaii/15626677764.pdfIn PDF document text
    • https://cdn.sqhk.co/riduwadanu/hiiehje/dasetitowefobezenomagun.pdfIn PDF document text
    • https://cdn.sqhk.co/liramesot/djhhdUa/bravelands_book_6.pdfIn PDF document text
    • http://idealica-official-it.website/zulupazlu3dm.pdfIn PDF document text
    • http://damvglaz0.xyz/veraxudufexevedipskkt.pdfIn PDF document text
    • http://letnesil.xyz/xagosudobigejuta3rg19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jozaponi/gazejoz.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/futunavasateji.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/16868410064.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/pressure_transducer_electrical_schematic_symbol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef8440e-812e-4f9d-ad45-2912236942f9/how_to_make_a_hidden_locking_mechanism.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/mtg_bogles_sideboard_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a8df57-2db1-44e6-9783-a79bc55871ab/28350816146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9eaa13b-b4ce-40f5-a745-6d6554f3ce33/rebojejojinazewopowaxan.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_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 5260 bytes
SHA-256: 675ad796b5ddf5a91453bbe792d2d9dd54a60f6a81a35898be8b31092c0805f1
font_01_sfnt_off0000fcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD5 11456 bytes
SHA-256: 357c60ccc69ff235c1429be6bb6614d5c095967ad224820e12fbe1f73a7e9633

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