Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03ec3a694849a28…

MALICIOUS

PDF

73.0 KB Created: 2021-10-02 10:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 015dda049503cfe6f7a53eb2884d1b22 SHA-1: 7123bd4818a786b899c3c82a23159d25d4eed92b SHA-256: e03ec3a694849a2883e0083df6218573b7a5732b00e6f169dc5915d7602f0198
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to disposable domains or IP addresses, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI heuristics point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://asiantms.com/ckfinder/userfiles/files/11433846051.pdf In PDF document text
    • http://applecentervn.com/uploads/image/files/gulerawamarut.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/86094125866.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/zanimazedalijabukuzisinaz.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/roriritasupulazojogixut.pdfIn PDF document text
    • http://cobweb.janci.net/upload/files/49409223587.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pobamejipikixebunuxojofow.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/66589511735.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/sepezoxutowadujuke.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/kefaje.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153b2470fc8f---fekudovinub.pdfPDF link annotation
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/a619c78f0bd67b942460f925564e53f7/58826439605.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/30126095654.pdfIn PDF document text
    • http://ciatic.saintelserver.com/archivos_editor/file/xavatedujowimiges.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/daratajokixokisovab.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/sajitefevedikibexotiju.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/kolusaxi.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/nebupigurogoxoxutudu.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/motubuwumidu.pdfIn PDF document text
    • http://wenyanchem.com/upload/files/xiperodizupamoxib.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/pukot.pdfIn PDF document text
    • https://pepsima.biz/files/file/nesewozogefisesavajajawez.pdfIn PDF document text
    • http://esistore.de/userfiles/file/65424682522.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/799af82c58f3b35b1509c23b299b5bdb.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/nejilurewawosote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=9th+class+telugu+1st+lesson+questions+and+answersPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB73C 11104 bytes
SHA-256: a7ed5e07421c11f70aa7fda114571afc644655e9cc40e44be458d7ea2db2a3c1
font_01_sfnt_off0000d0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B2 17304 bytes
SHA-256: 18ca0f8d177c5c32bd27fca25f540513749d760cd9df8013764d7a3b541f21cd
font_02_sfnt_off0000fd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1