Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9145d57f40b8cd…

MALICIOUS

PDF

85.6 KB Created: 2021-03-25 12:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 69c3d35d37a9b8c47c382fc4d30632bc SHA-1: ff393b837bd8b6f23883f7b90d3dc47626b2ac6d SHA-256: 3d9145d57f40b8cd94ca40e0539204db56339eb6261404ea06e097c57956199c
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous external URIs, with a primary one pointing to 'dugedepap.ru', likely serving as a lure for malicious content. The PDF structure and embedded links suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/wix?keyword=secrets+of+sarlona+pdf PDF link annotation
    • http://mandarin-fruit.space/bazekopuwehge8h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_60038a8aa3d19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503197/normal_6055137b99151.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5fcdb27254375.pdfIn PDF document text
    • http://vosalax.22web.org/how_to_connect_bose_acoustimass_5_series_ii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401696/normal_605a210dc817c.pdfIn PDF document text
    • http://dvigatel.guru/gaxobabubiluwomhvsr.pdfIn PDF document text
    • http://ndfnasg.xyz/resumen_capitulo_1_porque_le_pasan_cosas_malas_a_la_gente_buenak9pz9.pdfIn PDF document text
    • http://ruszaimclub.ru/tafseer_ibn_kaseer_with_english_translationomvp0.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/071377b8-fe4c-4604-b1ae-d3eefc750ad1/zezevigekidogekixeza.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/fozanoterotum.pdfIn PDF document text
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_01495a7b3a5044cd8084556316d5d561.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6086e0-cd3f-4452-b860-0a42917c532b/9475281881.pdfIn PDF document text
    • http://jonufinufezo.epizy.com/review_sheet_exercise_9_the_axial_skeleton_answer_key.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_35ca0ce68d2846ec9085945d5b80be88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/wojumapamalotoluzaxax.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/bokofoxujani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8776e55-8c4b-4a90-8d07-cf2f6d211de5/grohe_concetto_kitchen_faucet_hose_replacement.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_off000111bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BF 5252 bytes
SHA-256: f342ad50b6746f7337ff9ff502d863990915b229c5e53b828d53d66c42e5a83a
font_01_sfnt_off000123ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AB 11124 bytes
SHA-256: 163ab0777f6040bd4ac0e83fdfd2b0dd0bc8215b58d92f443e53c7d170f30c16

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