Malicious PDF — malware analysis report

Static analysis result for SHA-256 6294430b61bcbf22…

MALICIOUS

PDF

92.6 KB Created: 2021-07-12 23:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 46c50737110af869c84d93e99bb29d66 SHA-1: f8bac7df80e8894a7e6d9a5b4e63f33a1db3c78e SHA-256: 6294430b61bcbf22cfa760dc207650be82d0a5f7a00e6966ddaca3b3770c1e24
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL. ClamAV detected this file as Pdf.Phishing.Trojan. The embedded URL, while flagged as benign by the reputation service, is presented in a way that suggests a phishing attempt, aiming to trick users into visiting a potentially malicious site. No scripts were extracted, limiting the analysis of dynamic behavior.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3767

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/eaN1Eb74jJI/square?utm_term=stay+with+me+by+rihanna PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d03424e1847d8367e9bc/1625870388190/29165459382.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8cf10c81c3e1fd729bd44/1625870096722/the_story_the_teacher_told_us_was_very_interesting.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8f68c426b81e8300e1fe/1626115945395/vunegopokawuxivi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 10456 bytes
SHA-256: ae8f5db2da0ca61290c03137deea8a16f182c0827fda94b586a30c8e2ccae03d
font_01_sfnt_off0001062c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062C 16244 bytes
SHA-256: 7a37b07300b32578f7ede96d47c75fa9192719f5b1a4927122f47b15168b6d62
font_02_sfnt_off00011c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C20 18088 bytes
SHA-256: c0049b00a51458c8d964d628ad40dea9794c367831e09f99b0bc8487d9b64962
font_03_sfnt_off00014bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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