Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff83c6a7c52e87fd…

MALICIOUS

PDF

67.3 KB Created: 2020-12-21 14:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ae536c2ed2c4ed83d2501f4b4117b030 SHA-1: 9915ef7ce827eb62b856880c48de63b04448075d SHA-256: ff83c6a7c52e87fdd5f98f325b8f011a6e6b538ef67712999585eefc0105efd3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that, when clicked, likely leads to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to 'blocktopograph apk ios', suggesting a phishing attempt to trick users into visiting the malicious URL.

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://trafffi.ru/strik?utm_term=blocktopograph+apk+ios PDF link annotation
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/zagowomuzodaxuboka.pdfIn PDF document text
    • https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/tegajiruk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc589d1-844c-4db6-9861-fb89b00fd78e/75773613145.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/xoxebom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1f1d0a-fdea-4e87-9dd8-6999a9b138f7/22196006058.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/58233923486.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc362cf5687f52b6b9115bf/t/5fc962f793b4dc627b52bb67/1607033592318/fikixigikisuferopopofap.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/one_way_anova_example_problems_and_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8a684d-ae8a-418a-9db1-b8486b34bf79/kifodi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/28501676736.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/amgen_annual_report_2004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c64dbc-16af-4f19-b9ea-66062415650d/iptv_stalker_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99dda625-af1c-40d4-a1d7-d04453337bb6/17859634372.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_off0000c839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC839 5308 bytes
SHA-256: 868849076d59862ee7251ca55c157e590b1230da9a6360d100409dd834b6fa09
font_01_sfnt_off0000da48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA48 11388 bytes
SHA-256: 5da700fb815a9c7e3375d467ab5a7758ccd82c564a8b1f249670f2dc623c6a9e