Malicious PDF — malware analysis report

Static analysis result for SHA-256 e086c3c5b26070a2…

MALICIOUS

PDF

114.9 KB Created: 2021-03-28 08:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5a1c6e323dbd330bbcabf68e8f414e9 SHA-1: a610a0c488bc2d4ba0c3a60c01ff14263e814ab9 SHA-256: e086c3c5b26070a21b7cd300a53cf21aed54b889befb757002ab4e4e89ff638b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier also indicate malicious intent, specifically flagging it as a phishing trojan. The embedded URLs, such as https://midufefew.ru/wix?keyword=bailes+bolivianos+caporales, are likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/wix?keyword=bailes+bolivianos+caporales
    • https://cdn.sqhk.co/xidafigutoxa/iigMgd6/movie_flix_app_for_android.pdf
    • http://psychologyrelax.xyz/21838769076mx6h6.pdf
    • https://cdn.sqhk.co/noviraxat/GjihhBl/bugatti_la_voiture_noire.pdf
    • https://cdn.sqhk.co/fusevatuboxa/jdexihq/educational_psychology_books_in_telugu.pdf
    • http://tetupamino.mywebcommunity.org/wafalilofakazadaf.pdf
    • http://inostrana.com/420383783439hj4i.pdf
    • http://lotibamuzuti.scienceontheweb.net/tazajafativuw.pdf
    • https://cdn.sqhk.co/pumopivosoba/cmxHenk/94689533487.pdf
    • https://cdn.sqhk.co/femelofep/MJa8Cha/visual_studio_code_login_github.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kovibu/coleman_powermate_6250_generator.pdf
    • https://s3.amazonaws.com/fosagoba/9385781057.pdf
    • https://s3.amazonaws.com/jovekus/basics_of_developmentally_appropriate_practice_textbook.pdf
    • https://s3.amazonaws.com/dikobepibelun/apocalypse_super_system_chapter_23.pdf
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_47dbe88118154c0494945f38105b1561.pdf?index=true
    • https://s3.amazonaws.com/sixolose/22365922164.pdf
    • https://s3.amazonaws.com/tobaziw/31784160797.pdf
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_3fcd5e90813d405489695d64d3feef88.pdf?index=true
    • https://s3.amazonaws.com/tudawufed/lemelojugumivuwokapij.pdf
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_c49937385f124834b1d6c55df9c1df6e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001838f.bin
8ea400e9c58fffcec84637ec5d76bfc25836f6e60339a9b94de6a77785ccb295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1838F 5176 bytes
font_01_sfnt_off0001953b.bin
a5a04824439df9f5b1831b3f14a2cb638bb6ef03ff9271c2195e31d30ea6e507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1953B 12440 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.