Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3ed31f49c3aa35…

MALICIOUS

PDF

81.5 KB Created: 2021-07-20 18:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd279a323ed649687e89be456a707f53 SHA-1: a3d3fdd10e6d9aa28d66db382fb50fc41d78dcc0 SHA-256: df3ed31f49c3aa353e5c976b8773f66c3358d591f0a6377bef5959598aa58874
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to external, potentially malicious, resources. The file's structure and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/um1bUVUAM38/square?utm_term=lysosomes+meaning+in+english
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f226ad80d83038fa762552/1626482349508/peter_baker_and_maggie_haberman.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f040fb38a0fc3ca96c6439/1626358011284/visigetejo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0f8108cd1ac765d4cb98b/1626404880552/courage_synonym_english.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecb21349e93b1e4da12ccf/1626124819306/7322940166.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e931f52f3c4128e18addff/1625895413560/simply_smooth_electrolysis.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2192c4b68c137e68efded/1626478892873/fujobepoderej.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f5d51ab548fd0179874eef/1626723610591/company_collateral_meaning.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f242429c7c9f0ea98f8fd5/1626489410460/8841651374.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91d77f492d21a0f6ac54b/1625890167924/dragon_ball_xenoverse_new_update.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3b0a79ee5897bffa6794d/1626583207694/xuxavomebavemosimab.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee16a7ab0cb8743be18417/1626216103761/72045794317.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f42857ac7784023573291a/1626613847827/lack_of_sleep_and_aging.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_off0000d992.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD992 16792 bytes
font_01_sfnt_off0000f1a9.bin
e208ed8b54e7384238314627cd0ffc671f75d8857b1a9e648c0b27cc5e880c2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 10428 bytes
font_02_sfnt_off0001090a.bin
3669d7fe9a982a9ce547087d2ddcfed7fd46b3bed672c18c0ae034f9695eb900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1090A 17696 bytes

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