Malicious PDF — malware analysis report

Static analysis result for SHA-256 df760cd58c4941a5…

MALICIOUS

PDF

75.4 KB Created: 2021-07-19 09:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a2bdee0ff2b2f7422a17bd6948ed9c78 SHA-1: 86839c30deb062715e6ad803f69c5beb75ac5506 SHA-256: df760cd58c4941a50074e0bee80b3d8783f8e3be1d4a42ff923e1e85ce279ca5
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 high likelihood of malicious intent. The presence of an embedded external URI suggests an attempt to redirect the user to a potentially harmful website. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution vector, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/sq/ugae/~3/r_nBws6J8g8/square?utm_term=classic+car+history+by+vin+number
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f4bac5731d8c7c6f0d66a3/1626651334241/20211931788.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eda94cf53e3457ef87e0f9/1626188108844/describe_the_methods_of_data_collection.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f05571842dde416d8143b0/1626363250056/23518737472.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f18213ff43f8054455d772/1626440212050/plant_and_soil.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee6357f6c772366d307870/1626235736071/movepofidazowifopote.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edec9b8f209f4d8285784c/1626205339480/tangential_acceleration_in_circular_motion_formula.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ee6c309bd63f3d83b392/1625878124361/veviboridutorunaripi.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7dde1afd06e4982ea8e1e/1625808353511/70000946918.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e79ceafdc75e32ab03f6bc/1625791722599/dasujifotozawosep.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edc4d2f6d8087912bbd6aa/1626195154267/damolugunisonemuxokofural.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed2fe4bc85f73bac25195f/1626157028366/39857816625.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_off0000c5c2.bin
f8fbf49250dc4d08026e6d5842e1a7cf0748746154a9a31b83d49418354182f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C2 16308 bytes
font_01_sfnt_off0000f00a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 16792 bytes
font_02_sfnt_off00010821.bin
d9ef300c127cfdfbb7459a8e9df6635dc43b060df51e140d2db6962662512be1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 10944 bytes

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