Malicious PDF — malware analysis report

Static analysis result for SHA-256 056129638086b773…

MALICIOUS

PDF

75.9 KB Created: 2021-07-13 16:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddcb727a6e590d49934d2282ff4302b8 SHA-1: 7877bbe4c42bc215f796c6bea421d737d356dd7b SHA-256: 056129638086b77389fbab9f9b01fd738d675b66e924369cda2cf39ea6207d0d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into navigating to harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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/~3/5VO7y1TeAqQ/square?utm_term=addition+and+subtraction+to+100+worksheets
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7d1afa431ed42d2fb7ceb/1625805231595/hereford_cattle_for_sale_near_me.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8eca766be7e490f0d2458/1625877671320/alcohols_are_isomeric_with.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7eb8252059f1ec1e4dd9d/1625811842489/fuvumofazulag.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d1dd00b83d0a108858bb/1625870813644/how_many_years_does_a_chicken_live.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecebb12ae47d2ac91c0ce3/1626139570077/gate_biotechnology_2019_question_paper_with_solution.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed98e9a73a263c31dfff38/1626183913771/french_onion_gratinee.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec76ea40121f566898bbfa/1626109674446/best_electric_suv_2020.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7cd769ebc0053f315d9ae/1625804150927/basic_mechanical_engineering_questions_and_answers_for_interview.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed0272ff6d86145b9b3a8a/1626145394114/50837721406.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_off0000c593.bin
3fd00786fe3d8305eccef4c014cd30600035d83202c9ae839bcf2c3fcd0842b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC593 10996 bytes
font_01_sfnt_off0000df36.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF36 16792 bytes
font_02_sfnt_off0000f748.bin
eedbeb9b6f3b1234a5cb675749cf9a5e0fd2c238a4c83fefd3dc2b9dc4e0a2d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 16356 bytes