Malicious PDF — malware analysis report

Static analysis result for SHA-256 495fe9d619993671…

MALICIOUS

PDF

102.5 KB Created: 2021-07-16 07:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b1681aa11a2701a063fec44d58d057e SHA-1: 6c01d9196e4efca6e7fa167b1cf3685fe61d51d9 SHA-256: 495fe9d619993671b3babc9ba9690c669ede62c9651be9cd6c6686853daf706a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URLs, although many are marked benign, suggest an attempt to direct the user to external resources. The presence of PDF_URI and EMBEDDED_URL heuristics indicates that the document likely contains links intended to deceive the user into navigating to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=the+unit+of+first+order+reaction+is
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee4e7ae03b615e098f4004/1626230394197/majiwupexo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee7729fd66ff3739f1d96d/1626240809954/rupoderopil.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7f38f7d3b385c94b69163/1625813903476/meaning_of_indulgence_in_tagalog.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec92b4af807f1e15269f6d/1626116788890/92490662141.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edacfde0c6fb6066154ad3/1626189054172/conciliation_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0a94e247c7e0f0264a2b8/1626384718803/fogovul.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9006cf4fe78435a393b4a/1625882732505/apostrophes_are_used_for.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecc7e008f5654265247252/1626130401099/south_of_france_cities.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9941e0914637f38ce3ca/1626118465380/teguduje.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_off00012a05.bin
8d14b015bd35131ad3236fa858bea4b5f3d490bd084471334b5094edbcca53c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A05 19144 bytes
font_01_sfnt_off00015d80.bin
52ea676f407045278d13265b576a77320da1be0cc319bb143e3439fe9e1f45cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D80 10592 bytes
font_02_sfnt_off000175a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x175A9 16792 bytes