Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc757f7134af3d0…

MALICIOUS

PDF

81.0 KB Created: 2021-07-14 07:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5ecea229e352b7dbfcd8fe261ed099b SHA-1: 9ce080f23ff727a4839dfb85cf90c9938bb34d70 SHA-256: dcc757f7134af3d0e8384490e05c5e842f836a392c7771d19f4fc04b8794041d
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains embedded URLs, one of which is associated with a potential phishing or malware distribution attempt. The PDF structure and embedded content suggest it is designed to exploit vulnerabilities or lure users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

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/-MXWpcYQ7kA/square?utm_term=less+than+equal+to+symbol
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec817ae94d7a30e0550ab0/1626112378447/single_handed_sailing.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec90525338e9546e47d4bb/1626116179089/how_many_carbs_are_in_a_bottle_of_champagne.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed1ecd6be96a4ec407048c/1626152653299/pinoy_tabloid_news.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edaca646a7611a87d0e54f/1626188966686/30800580535.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed9c8f5d4dee687f486e4b/1626184847609/65432102962.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93ecb2f3c4128e18b4054/1625898699855/71143868570.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92158085b1c120f980098/1625891160342/6922214812.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_off0000d839.bin
9b8795e84ced7669b005bf6a13819c1a45024ad8f2289a5b434208a0924479e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD839 17460 bytes
font_01_sfnt_off0001061e.bin
cd548ba6868a9258c52c8b41d93917ede1890c7e2090c9dadbcd8ec0722bc4de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1061E 10640 bytes
font_02_sfnt_off00011e56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 16792 bytes

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