Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d9696d71e47115…

MALICIOUS

PDF

102.9 KB Created: 2021-07-13 17:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d087b502fdefb007b198b6ae2b3f1eaf SHA-1: 8f7969d8084e615b535e9ad09a656db75646d573 SHA-256: 87d9696d71e47115af8aa21c5ae8129f24c7251cfabe2f1bbce14e693914ff1c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV with the signature Pdf.Phishing.Trojan. The embedded URI points to a URL that appears to be a phishing lure, disguised with a seemingly innocuous title. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3074

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/AG-UZpNbJGc/square?utm_term=percy+jackson+and+the+sea+of+monsters+free
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9340a37cb9044756096f4/1625895946387/high_platelet_count_and_high_blood_pressure.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed8beecdb2ce13c52813f9/1626180590927/natural_gas_hydrates_a_guide_for_engineers.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9508e19a9f87deb745997/1625903246513/vba_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e87f56bce4f543af962d09/1625849686287/self_analysis_paper_example.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7ff8cc97682122425bef/1626111992468/raffle_of_the_day.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8d4a801cc8e4ceda01960/1625871528203/nurawefolapegilupigebe.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ddd.bin
e56bba586f25b7bb331306cce9154593ee2e022724dfd3cbe2c17502343e7eeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDD 1784 bytes
font_01_sfnt_off00011642.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11642 16792 bytes
font_02_sfnt_off00012e59.bin
fda136e1ba684ca329230d56143c1fd37bbe87236a42870159f3a0150711cd22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E59 10940 bytes
font_03_sfnt_off00014792.bin
d7cd55395ca8c5b3ded2e9f44cdcfdf374181edfe397b2f4d7fa01d4c9eac515		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14792 16280 bytes
font_04_sfnt_off00015daf.bin
a865019e10c1af387e276ee802d93e45129bccb8b91742b573c1c6abc908eba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DAF 18544 bytes

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