Malicious PDF — malware analysis report

Static analysis result for SHA-256 94735f6d350ac926…

MALICIOUS

PDF

76.4 KB Created: 2021-07-15 22:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc1a8353244f922300fb5eb4472a8ae6 SHA-1: ac838b3b6a31c9404e4e87e01f67bb07ec7c8e19 SHA-256: 94735f6d350ac926f4a4beef7254dbdd56f3d1bf9b198baeec3cd3249123e00d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The PDF contains embedded URLs that lead to seemingly benign Squarespace domains, but the overall context and detection suggest these are part of a lure. No scripts were extracted, but the PDF structure itself is likely exploited to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/pL_UGxDroB4/square?utm_term=how+to+convert+a+dwg+file+to+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8189aa431ed42d2fe589b/1625823386410/2660089343.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7dcbef188817f7e0d79c/1626111435425/life_of_ram_audio_song_download_mp4_telugu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec90c63631fd4ab81729f1/1626116295026/wanalutowuwesibebenewebo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edcac13e01114371261cd7/1626196673820/92174618316.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec83de4c0b954f9ea42059/1626112990337/xirosezebezilaj.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9374fe370ac63228997c9/1625896783804/55307190477.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e581c0906550d9081ac6/1625875841797/loss_of_smell_homeopathic_medicine.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edcbaf670c344ea75b05b4/1626196911440/49744642328.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8cd3c32416487af01965/1626115283381/how_to_convert_to_word_document_with_microsoft_word.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7991157d2352c92787c1f/1625790737510/witchcraft_in_europe_400_to_1700.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f067bb7865aa57457fdd3d/1626367931467/78264628938.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_off0000c931.bin
582d504b7674ffbd9a71b5e88711446ffca82274deb509b1edde8e135aee8999		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC931 16708 bytes
font_01_sfnt_off0000f478.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 16792 bytes
font_02_sfnt_off00010c8f.bin
93f3164c1579d22c6cfa1e32360e437c3eb0ff7c2dc6b62c2c2b5007187908b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 10772 bytes

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