Malicious PDF — malware analysis report

Static analysis result for SHA-256 91166ced32cabccb…

MALICIOUS

PDF

78.3 KB Created: 2021-07-13 21:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1538ddceb3d3fc22a84bf3968bf0f28e SHA-1: 5aef53dd202bb696766325244ec599bd6393c428 SHA-256: 91166ced32cabccb93c153a102e7be419b3908769c41eb6d891d087be76e3041
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs, one of which is flagged as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URIs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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/razvivatel/yapz/~3/gPkW7oTCsL0/square?utm_term=1965+ford+mustang+gt+fastback
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e902afc14ff043cd5ba2bf/1625883311154/pojefugixemodul.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94d873f195e1e4037afb9/1625902471425/organisational_culture_and_leadership_schein.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8aeda51c23d46c465fe2e/1625861850418/73499579580.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e94cff3b7e7c6334519be8/1625902336181/68725702173.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7af9c23621b4743e1b58c/1625796508138/win10_loader_free_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eda83c920f291d39217c5a/1626187836122/security_in_computing_5th_edition_solution_manual.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8544c217102653d66d48/1626113348353/8424185898.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e780711159a939c7c6e4de/1625784433414/organic_synthesis_the_disconnection_approach_2nd_edition.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e92bf8f107ff2467e96dd2/1625893880301/xaxifubasuwizivo.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e90102c22c005c93374c3d/1625882882669/how_long_would_it_take_to_travel_500_light_years.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_off0000d11e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD11E 16792 bytes
font_01_sfnt_off0000e930.bin
4f6afc2201d1e933fb8a9829f0fb9e3b0b7721d02e58d97d3431259e376d218c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE930 16164 bytes
font_02_sfnt_off000112f5.bin
26dfbbedf80e4bb18e290c0168bd4753bb0597555b25cdd59fad92364a8aef9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x112F5 11308 bytes