Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdf00f897919126…

MALICIOUS

PDF

117.0 KB Created: 2021-07-13 17:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a12f26da01bc72e75eb2c8a3ecccea2 SHA-1: 926cadb4145ae79fbda6a659f7191fabb2c8d15d SHA-256: dbdf00f897919126439b0cf6b2658d5aa31ec2602491a2096dfc8d88beb3ded8
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by multiple heuristics, including a specific rule for advance-fee scam lures and a ClamAV detection for a phishing trojan. The document contains an embedded URI pointing to a suspicious domain, which is likely part of the scam to redirect the user to a malicious site. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6008

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://drafthe.ru/square?utm_term=pageantry+of+vanity
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9521af807f1e1526e1e3/1626117409865/zanobamonalozovuluval.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8d0a1efa1bb2f50747e13/1625870497348/wordly_wise_book_5.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec99cf9cb57f380a799fb7/1626118607265/fegonavuzewijulalowoze.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://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_off0001672b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1672B 16792 bytes
font_01_sfnt_off00017f42.bin
c99236bbe0e074095ca404ee34a12a70d40f6ad441e2d98f66f01de300c4141d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F42 10356 bytes
font_02_sfnt_off000196d7.bin
dddf99fbd86f2937e87f59a90e8fb54cc34e7c3ad68c0a3cbca6fc5ea04bfbde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196D7 18384 bytes

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