Malicious PDF — malware analysis report

Static analysis result for SHA-256 492e2ec04abe4f34…

MALICIOUS

PDF

82.0 KB Created: 2021-07-16 12:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23dce9336eb4eab13377aa095bb8108a SHA-1: 93700091ca2ac86c2dae420c8b1a6b0ccab10463 SHA-256: 492e2ec04abe4f34428f124523fd6c227bb2ace921bb0366c748eddb19b2cebd
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, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The presence of embedded URLs, though many are marked as benign, suggests a phishing or credential harvesting attempt. The heuristic 'PDF_URI' indicates an external URI was found, likely used to redirect the user to a malicious site. No scripts were extracted from this sample, but the overall structure and detection indicate a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9438

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/~3/0YvHz_IItD0/square?utm_term=soar+the+breakthrough+treatment+for+fear+of+flying+pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e76ec5441d4a28897ef65c/1625779909767/3d_chess_rules.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7df1a7e45264421f8dc0a/1625808666456/types_of_auctions_in_e_commerce.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edb81a8525735ba0d451ef/1626191898799/abc_thought_record.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee7e237426fb5109f868b1/1626242595353/brown_nose_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee19836d75c50a5d410fb2/1626216835277/19439091064.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f146d9b0b7347a52269386/1626425049792/how_to_install_apk_android_studio.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0717904801d6486b1f4e4/1626370425685/how_to_save_a_to_mac.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee5302b82b30476861c0d6/1626231554683/it_in_real_life.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_off0000dcb7.bin
d9b984af01cd7a2b49517a825a3abece1d4c93a43b8f446b6504c85a172247be
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB7 11296 bytes
font_01_sfnt_off0000f6a0.bin
ad527e8281dafc929a84c29bd191f9519b78d8f48c9e7a5ec7914c76a92a2644
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 16476 bytes
font_02_sfnt_off00012179.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12179 16792 bytes