Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe37ca05ece96ad1…

MALICIOUS

PDF

77.1 KB Created: 2021-07-19 22:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77ed009af4dffad4e76193560535faa1 SHA-1: eb76ffb31d3741c0f06e22087afc5c7d537ffc46 SHA-256: fe37ca05ece96ad1c6a4a5be7b6ce1a0f4b05a391c1afc4d423474d3d81e3687
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. Although the document body is heavily obfuscated and unreadable, the embedded URL suggests a phishing or malicious redirection attempt. No scripts were extracted, but the PDF structure itself is being leveraged to host or link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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/rCno-htTzZk/square?utm_term=free+time+activities+worksheet
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91b76db8bb141bad9260d/1625889654959/white_winged_dove_song.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1b871046f97577cc9cf92/1626454129487/wafirojizavokekisapu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e76aa759d923514b22030b/1625778855205/gross_anatomy_of_the_human_male_reproductive_system.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7ff03e8ef4d41b4fc3177/1625816835223/88833439200.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edec244c056a31b81cbec5/1626205220785/33905478748.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f258231db272198f8d0369/1626495012108/phrases_like_live_laugh_love.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f245a8efed6b61d475ef6a/1626490280185/dejisitifituzavanawug.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee6ef55f7927514e402c05/1626238709966/aetna_medication_prior_authorization_form.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0744bfa9d7013435e85f9/1626371147578/37151360614.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_off0000ce38.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE38 16792 bytes
font_01_sfnt_off0000e64f.bin
88166539446522242f9ee0c565ac1b6550bd264bd600a05cd86c24816810342d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE64F 10568 bytes
font_02_sfnt_off0000fe83.bin
341539705a96754451fedd42ba9308a88b830c867f57c08627c60c70f08a2d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE83 16192 bytes