Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94a8d02c761b02c…

MALICIOUS

PDF

73.4 KB Created: 2021-01-10 03:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 87aa765975a55a0ccf83b6b790d537e2 SHA-1: 40ea6fd4ea6727fd5b5727e2078059a7e587c659 SHA-256: d94a8d02c761b02c5bbf70757230286950ecbc5c49fc955e86ee833374046cd7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/aws?utm_term=biotransformation+of+a+drug'. This URL is likely used to host phishing content or distribute malware. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://ggtraff.ru/aws?utm_term=biotransformation+of+a+drug In PDF document text
    • https://site-1172779.mozfiles.com/files/1172779/monkey_go_happy_4_walkthrough_level_11.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/eidPGid/startup_ranking_framework_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/ghtkOgf/margherita_pizza_kingsville_maryland.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/U5Sjeom/paper_toss_3d_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_5fbd44afe8ed0.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/JidgesX/90_s_quiz_game_level_17.pdfIn PDF document text
    • https://site-1171372.mozfiles.com/files/1171372/56493601600.pdfIn PDF document text
    • https://site-1167953.mozfiles.com/files/1167953/jasewikotakaxodezaro.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/dexodekelaseki/xanapuw.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/33614869807.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/56667767200.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/38295045232.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_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 5244 bytes
SHA-256: ece9d1185376edba2ff198d84b1b8fe6a5183abd9a2736a6dd0537f75b9893b2
font_01_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 10580 bytes
SHA-256: 5f592b05b8d9a31852d8e0e070e786b338c878cce9c820443117a04c0efd30ac