Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a314102a13174fb…

MALICIOUS

PDF

97.5 KB Created: 2021-02-18 10:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5b77bd041800719cac5cbda16ebffb16 SHA-1: 7dbfcd7bcfe5c091826c8d0cf18237a03344647c SHA-256: 2a314102a13174fbc4b033e50ef1b204cb5bcc9a1c117624424fcdea65ae8729
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable hosting domains and link farms, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded links indicate it functions as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=list+of+2013+tamil+comedy+films PDF link annotation
    • https://cdn.sqhk.co/bapisolel/ager5xW/xonix32_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/idBjhoO/dc_comics_wikipedia_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/jjgjg55/descargar_battle_warship_naval_empire_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/jhwWhdz/65094973420.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/jaIOggD/83894529684.pdfIn PDF document text
    • http://jarobadut.22web.org/bullet_bandi_song_dj.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/cYjaVSY/duzeloliwititipuvuva.pdfIn PDF document text
    • http://igcopyrightclient.com/bc_yn_xe__g_vp13fo6.pdfIn PDF document text
    • http://xasebilebefetut.iblogger.org/91562160389.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/xhfjind/saxuduxawarasurotipijivi.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/gifZjcm/96182563848.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/tejuma.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/KmEiggc/facebook_video_downloader_apk_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jisekexebaj.epizy.com/10346027757.pdfIn PDF document text
    • http://wazuvit.rf.gd/gekipelutediwajuzogan.pdfIn PDF document text
    • http://pulonikolevezof.epizy.com/bepomedilezif.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_off00011ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBB 5284 bytes
SHA-256: 8e106456604b2ece3dcef8f049d82da6ffc7682f14f51937f9492ab1c6b9eb67
font_01_sfnt_off000130bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BF 10540 bytes
SHA-256: 71128ecc436d274d3224663e9ba519e1b228ec9b8d3974ce9f5e4f8078593e38
font_02_sfnt_off00015501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15501 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349
font_03_sfnt_off00016a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A16 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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