Malicious PDF — malware analysis report

Static analysis result for SHA-256 441be2493b038cd2…

MALICIOUS

PDF

78.9 KB Created: 2021-07-18 01:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a012ab4cd1a0b3a2362357a2a735bd29 SHA-1: 6163a6c3216908cbcf7a9b4bbd74bc9825d53537 SHA-256: 441be2493b038cd23523840591e92866db15ace5760b74bb3adf838e9eb3599e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF with a high ML classifier score and ClamAV detection indicating malicious intent. It contains an embedded URL that, while currently flagged as benign, is likely part of a phishing or credential harvesting attempt. The PDF structure itself shows signs of manipulation, with duplicate object bodies, suggesting an attempt to evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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://feedproxy.google.com/~r/sq/ugae/~3/7R6buoffwiA/square?utm_term=is+gymnastics+considered+a+sport
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f349b6c2d40e67ec0a99d8/1626556855020/womigofivodidexu.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee8904e9cbfe6c2fec13c6/1626245380179/chest_and_back_dumbbell_superset_workout.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee408b8feeeb055d9a348a/1626226827611/9329439066.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edd82d37ddb5439bf63930/1626200109788/65456626989.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_off0000d4cd.bin
d6e4802dc368c77ffc1e1fa13fae571f0f9c911e9d804e5a26666f243653a84a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CD 16188 bytes
font_01_sfnt_off0000fe9c.bin
ce3c10b375caa33d88f397748221f2673449420190d28cdcd5f8b69621e73fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9C 10876 bytes
font_02_sfnt_off00011790.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11790 16792 bytes

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