Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dcf8d88485e1534…

MALICIOUS

PDF

87.8 KB Created: 2021-07-22 21:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8a667d592fccc4e464b95cce3459ddc SHA-1: 2a3d7078421899b8304047432db545f65f283ec2 SHA-256: 1dcf8d88485e15346a38dcdbd085c57548a66186fd9beec0e70a685adca9dead
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. Although the document body is heavily obfuscated and unreadable, the PDF_URI heuristic points to a URL that is likely used for malicious purposes. No scripts were extracted, but the presence of embedded URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/gOBB6uaVNRA/square?utm_term=the+flash+by+grant+morrison+and+mark+millar
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f591f5e67a4e795661fed8/1626706422069/44793636291.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edd0158f209f4d82829b03/1626198037843/conjugate_property_of_fourier_transform.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ede2fea50f6e33a324a539/1626202878439/fomax.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f08d5fe0d9f61c7ffa94c0/1626377567745/46787265118.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed933b36a7a57c1cf537a4/1626182459874/pujikovovafowevuvuxet.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f8ab89a4da41491ecb6e42/1626909577704/71868617851.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed8b844616123fc5fca2ed/1626180485269/sotutelokuxutakomizibemo.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edcf146f118478735a747a/1626197780283/mesixexolovinukuluti.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f18ca07f50ba06ff8b054d/1626442912418/tiny_blisters_on_scalp.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2a9e2ec5ad00cc0886210/1626515938562/38651686934.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed925e67dd777ebfc36ed8/1626182238363/1_hour_time.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f8c7e615b3010569caa05d/1626916838778/chicken_and_broccoli_bake.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f3bced1ad9bf1c32b8cd86/1626586349221/two_hardware_components_of_a_computer.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f7045a5625677db05eb059/1626801242591/40138691259.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8820dbb514329faf9b85/1626114080687/53290966493.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f276d7c5d9e6782cd8863c/1626502871622/a_little_book_of_life.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8fb8637da2614570c8037/1625881478848/meaning_of_lue.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dddd.bin
854af1de8e0060dc54d6bfe8f53ed665ee6492b849177e47324c8fe128874b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDD 16092 bytes
font_01_sfnt_off00010797.bin
0d4edfebd91bc4cb3241ae971db79fef9a9e4c776a588f29dda8f557d27221f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 11112 bytes
font_02_sfnt_off00012125.bin
5c13cceb9d36bbc2bc20aea0fe1d16ac5c722eae827defaa6d249ccd2c25c082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12125 16160 bytes
font_03_sfnt_off000136ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136AD 16792 bytes

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