Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4910f7d171d0294…

MALICIOUS

PDF

81.7 KB Created: 2021-07-17 06:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c0a7e91c0610b9007872b00c1f23054 SHA-1: 444a39527f032bd5536ded3dfcce1a0165096c1b SHA-256: e4910f7d171d02941ddf3bd5f563ad06a1c6eee65f9d062ad740cd7626d5834b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded URLs, though many are marked benign, suggests an attempt to redirect the user to a malicious site. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/UQ8tT55rDuk/square?utm_term=steganography+project+report+pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9c83e0c99b3eb2d4cbb6/1626119299588/60074679706.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f217adfe2aa53669009cd5/1626478509877/80262491600.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f052e504d9354384f0b939/1626362597831/panosemulaxer.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0ad6f2c284d32c1675f7b/1626385775480/duplicity_in_tagalog.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed1ff7af55617121225642/1626152951260/southland_toy_shop.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f157c1b238236d2334ca35/1626429377596/double_layer_compression_coagulation.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f052339ad02013e370385a/1626362419724/how_to_get_proof_of_address_for_bank_account.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91d1f1448b06198485919/1625890079456/parallel_and_perpendicular_graphs.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee03b36f118478735fd669/1626211251691/gegukob.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f10eaad1d8e65aae85b3fd/1626410666996/41166061899.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f23e749dfa584dc9d3f385/1626488437200/cancers_of_the_immune_system.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_off0000dc20.bin
fb71cc5aa701e7d270f0e0dbf3feaaadcd208740bf2c14122302d32356a8a5ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC20 16744 bytes
font_01_sfnt_off000107dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107DD 16792 bytes
font_02_sfnt_off00011ff4.bin
cc99ec6a28e05c26c2e93b8ce2bde7e285ae2c291f048f1e7cdcf6f7682a9fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF4 10912 bytes

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