Malicious PDF — malware analysis report

Static analysis result for SHA-256 863cfd98ff29faf8…

MALICIOUS

PDF

75.6 KB Created: 2021-07-17 02:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b263ba8e3799cd3d00dea65efb84a842 SHA-1: b0c845ab785edf58ab7b08c2da0d4e0658961bcd SHA-256: 863cfd98ff29faf86f20cde8db0b82c549983fdf45f4a057ae0b5eb6dfe06d3a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It embeds external URLs, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the presence of embedded URLs suggests an attempt to trick users into navigating to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/nCRFBnYrBHY/square?utm_term=hbr+guide+to+office+politics+pdf+download
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94bc8b68d8f0f4bf9993d/1625902024263/31819336254.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e952210a287971af9b6ab7/1625903650009/wirewejowilubafobabewe.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0bfc3b238236d232d1650/1626390467361/tikavo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e93f0fe51f1f218d6aefd5/1625898767793/luzuxebinudoneroxefad.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e90bf9854c1d3b34862fa7/1625885689941/european_age_of_exploration_timeline.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7e4b7726b430b467bf71/1626111564011/bow_wow_ft_ciara_like_you_mp3_download.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_off0000ca16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA16 16792 bytes
font_01_sfnt_off0000e228.bin
796c6f91e0da245be44cea3761806cc64694f4cf413cd9a2fab1275d02b4f2f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE228 15296 bytes
font_02_sfnt_off00010921.bin
8e3d2ff3c1bed3ca96a5fbfd3f77c90aaeb24dc5152cd429398b7ab04fc624e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10921 11112 bytes

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