Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e8cfc58f64caed…

MALICIOUS

PDF

152.5 KB Created: 2020-11-10 06:08:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4c554efdc30abea998fcc428ca024f8e SHA-1: 1f6fbba3eb0406fe88b3e37996311b7e6c8c8f1a SHA-256: d7e8cfc58f64caed9aa0821dec29c9e5076cac99a34a66c4485509ac38a6ec17
202 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a link to a known malicious redirector, 'https://gettraff.ru/strik?keyword=freeblade+pc+cheats', which is likely used to deliver a secondary payload or redirect to a phishing page. The presence of a 'download button' lure and an MFA harvesting prompt strongly suggests a credential phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=freeblade+pc+cheats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f8a14fc46869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5fa5bc2772c79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/mod_apk_for_avakin_life_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d9236d-8dc9-42df-a9dc-9191fd61a150/osha_10_general_industry_final_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f57e7cd-aaab-4452-b526-cded446eaff9/69978538106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d60596-4070-4645-baf0-de53922f78aa/37199074328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9412d670-8cd9-41bd-b93a-ca049d5ea2e2/jogukavawiviropuvom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f226521-4b28-4235-bf73-94bbc1b46d64/nemanufuvudurumasibuposo.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/injustice_hack_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/2491121056.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/49882334793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dbb5e54-61e6-4274-969e-5423846ddc00/40234035277.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/faweme.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001eb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB60 2888 bytes
SHA-256: b6395d1dae2d22b85f09da846ae46dbed05fbf71697383e3f41d9dc35d58a2e7
font_01_sfnt_off0001f5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F5AA 5256 bytes
SHA-256: e1144b8772589ae20db2171fadf0fef2d17e06c1994df3ff2a97c398b7b1074f
font_02_sfnt_off00020775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20775 11956 bytes
SHA-256: 5e2964e4837e681111b35c53500469e8463cb9e4414bc498c4db6a834b8b7465
font_03_sfnt_off00022fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22FD1 20944 bytes
SHA-256: 5b2ab4e9a76977f0dfb3acb302d57516d98cad19b3812b03aa481a49147c1e08

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