Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca07d5130a2d9dc…

MALICIOUS

PDF

81.0 KB Created: 2021-07-13 20:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a9df4403193a87ac6ffa5267a9a32f80 SHA-1: 56cea2700033f170ef52cf74e4a37cf7b3ce8011 SHA-256: eca07d5130a2d9dc6cf8e359140022233abca12130bcddeb621eb063b9d736fd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous embedded URLs, suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to deliver malicious payloads or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/~3/4Ji06Fp1PxY/square?utm_term=limited+to+but+not+including
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e922882f3c4128e18a49a1/1625891464567/limifil.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed774d64a4563c8f7dd29e/1626175309344/police_report_example.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e76e82811a51280ff7ec50/1625779842510/91352808947.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9244b92abcc18c4f622e5/1625891915829/26752657558.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8c24ae534972f7b79b9d7/1625866827029/kikerusivegu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edbdfa6d720f75fb5d14ab/1626193402332/zuvag.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e84b14ba193607d16cd3d3/1625836308702/84787621544.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e868c209f15045325b7231/1625843906615/add_ly_words.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7c838d93aeb546a137938/1625802808415/52156348787.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed5ed902ab3a569c436386/1626169049698/chirutha_mp3_download.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_off0000dd8a.bin
0163198f5156d48b4464027580fe72be74ab040c86bc17c9b26ee28d78028d20
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 16500 bytes
font_01_sfnt_off00010874.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 16792 bytes
font_02_sfnt_off0001208b.bin
76c3b2a55fcb0ebb5353465dbefd552722c6d997667c00d33f37dad68ee0dcf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1208B 10480 bytes