Malicious PDF — malware analysis report

Static analysis result for SHA-256 84de01c2a52281e1…

MALICIOUS

PDF

79.1 KB Created: 2021-07-13 18:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bdac40b338a69115454664bb8344f360 SHA-1: a41240312996e0d53b87ba2fca3c423bb3157616 SHA-256: 84de01c2a52281e10b3b3fb2ee5f5f25c2e96037253f71e2f00a0ac60b1c8889
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests it may be used for phishing or to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving user interaction to trigger malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8571

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/v-xubMviL4Y/square?utm_term=a+letter+to+my+ex+girlfriend
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e961d8f4fe78435a3c7f7b/1625907672792/73564160728.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7e7e5978cb5ccaaa4ffa/1626111614860/natural_burial_meadow.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e76dd159d923514b225435/1625779666020/iliopsoas_release_physical_therapy.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed05fff2de0a6ebf2e83fb/1626146303990/how_do_you_find_the_protons_and_neutrons_of_an_element.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eda116151a035e9e7c20ba/1626186006278/50099617705.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e85e19cd81d06bd3a01f95/1625841177790/normal_dissolved_oxygen_levels.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_off0000d82e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD82E 16792 bytes
font_01_sfnt_off0000f045.bin
1d9553e22a200afb7c54c419c48ecb6bce0b0531a5c1c3f1e2d1fc70ba4c44ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF045 10564 bytes
font_02_sfnt_off00010822.bin
b9c8564061194f42319d614ba8d5de0b55c34ca234d415e423ad383bbcfe978e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 15852 bytes

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