Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7a8bc74d2efa89…

MALICIOUS

PDF

79.9 KB Created: 2021-07-13 17:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f378e3ee9285888cc8af83f879b9fe87 SHA-1: db28e700d569d5fac9de633b6c2f729386473091 SHA-256: 1f7a8bc74d2efa89adc90b8c2d5c4acb86dd343cb5d9abdd777cd682d7e2df41
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing attempt. It contains embedded URLs that likely lead to further malicious content or exploits. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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/sq/ugae/~3/nCRFBnYrBHY/square?utm_term=external+rotation+of+scapula
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed4cbb5eed834fcc34f0cf/1626164411309/another_name_for_skeletal_muscle_cell.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ded80a287971af96951e/1625874136682/xuxaribedobasu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecd1cd446c44105d48a5d1/1626132942090/passing_concern_nyt_crossword.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e864b3f4c9ee2c1c9ef6cf/1625842867228/98498117898.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9317b5fa2eb14b90c5d88/1625895291096/xosiruvofamifezejo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7b61e7e45264421f6ccc0/1625798174182/nickel_and_dime_website.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e900e9c22c005c93374bf1/1625882857360/59036432479.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecabec97282d6f46942aec/1626123244624/strategic_tactical_and_operational_planning.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7a727e2b6271615a811c/1626110579456/despite_the_fact_that_example.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca78811a746407a44beca/1626122120229/zafili.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_off0000d52f.bin
397667bba6d36aeedc4c8f0506422b1e391dbaa10054739c961bb99f2cbf02e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD52F 10656 bytes
font_01_sfnt_off0000edb4.bin
38a1b40f9e325290cad0f2a1e7e21593950d8ae662c86e0f5c02fbea41757a19
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB4 17344 bytes
font_02_sfnt_off00011b3f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3F 16792 bytes