Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd69aaaa557867db…

MALICIOUS

PDF

66.0 KB Created: 2021-02-26 15:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b69fe6ffbcf2d2904cc24fec42f2358d SHA-1: e936e4ca5beb13c94b03c4d8870686e95bcb5a02 SHA-256: bd69aaaa557867db8c9d0f0e62e39a90b6098ea5d86dcf5fe10f057cf9a60dd8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'ponafet.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'What exactly is a callus', indicating a social engineering attempt to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=what+exactly+is+a+callus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477387/normal_5fdddf79d12b6.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/bise_sahiwal_gazette_2020amjfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448980/normal_5ff8d8b209a77.pdfIn PDF document text
    • http://kagutakonupana.iblogger.org/avid_pro_tools_software.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491969/normal_5ffae81926df2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445726/normal_5fc9461bb231c.pdfIn PDF document text
    • http://copyrightram.net/large_format_film_cameraocda0.pdfIn PDF document text
    • http://bitjoms.xyz/catecismo_de_la_iglesia_catolica_vaticano04bs1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_60004e81d6a9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5fd155e71d02a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajiwewovipu.epizy.com/kazumaxuneru.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/67092978279.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/dineviwejewibigodos.pdfIn PDF document text
    • http://xofukadebinomo.epizy.com/what_is_the_primary_principles_of_scientific_management.pdfIn PDF document text
    • http://zumepule.rf.gd/online_certificate_courses_in_computer_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/zozarapo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C3 4972 bytes
SHA-256: c9e029e824e6a9dde47d9864889b466e720f654c602345708fe3ab6bf6083935
font_01_sfnt_off0000d6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C5 10556 bytes
SHA-256: 221ad585427b18a26869d61d027fdc3c0bce66d93cd29d3e68e4d8fd3a0ac2c1

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