Malicious PDF — malware analysis report

Static analysis result for SHA-256 a810c694376fee1a…

MALICIOUS

PDF

78.5 KB Created: 2021-07-14 06:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c5717415e653914a1fa88fa5392837a SHA-1: a33902433ef2c346afc6314d408981fc616f79c5 SHA-256: a810c694376fee1a44545f89ee135c8d92c7fd6953fec9eb6de7a4d597d771b8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded external URI pointing to 'allytemp.ru', which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9478

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://allytemp.ru/square?utm_term=heat+of+solution+experiment
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8b87054872c510b8d8b77/1625864304353/74366160921.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8f0b8c19ad4998dbdc16/1626115852082/67017909653.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8f5ac81c37306b2f8c2b/1626115930945/marketing_proposal_email_sample.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f1b583ae0c490236ea36/1625878965964/what_to_say_in_myself_in_interview.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee440b9c71001bedf64968/1626227723645/and_the_last_time_i_see_the_light.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed95ae0999c452037196ec/1626183086534/bozuriletizajiduw.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edfedd172ba47bdac747a8/1626210013822/cathodic_protection_on_ships.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e82cca4b964f05b84b4ecd/1625828554181/comprehension_passages_for_grade_2_with_questions.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_off0000cdd0.bin
b8d2337912df9e6ecd30074cbe0d4497db5f6390605136d2143f26af375460ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD0 17992 bytes
font_01_sfnt_off0000fd8a.bin
2875b58c091710fa029adc4289e5a6b64c241355bc8de1788574a3a236ca7e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 10712 bytes
font_02_sfnt_off00011613.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11613 16792 bytes

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