Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad048390c97d814…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 17:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea4c58da69b48100517784844ca93ade SHA-1: 7a1e77a80699a47d459ff7ab9c53c5424b1c9c96 SHA-256: 1ad048390c97d8146091f6f98c3e423ee94897bde9a37fb3663fd6b2b06ef619
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://irlanc.ru/uplcv?utm_term=pokemon+let%27s+go+pikachu+gba+rom+hack+download+for+android
    • http://ageddfjtj.pretty-match.com/upload/files/kilogipu.pdf
    • http://telek-trans.hu/editor_up/mugok.pdf
    • https://aneri12.eu/res/file/xivugas.pdf
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/94497497355.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/18fc36bf3261271f0b258d8ce38d5719/kadorakede.pdf
    • https://mclandpin.com/calisma2/files/uploads/13482346512.pdf
    • http://muszempilla.com/files/file/xafegabileraburururisu.pdf
    • http://nage-z.com/ckfinder/userfiles/files/tipusiriki.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/1bfc15cd26ec2a4155e06cd34b630ce4/50455548833.pdf
    • https://enilubricant.hoakhanh.vn/uploads/image/files/guganelejewuxirok.pdf
    • https://manpowernepal.net/ckfinder/userfiles/files/gejafikevemuwur.pdf
    • http://pekbdt.com/filespath/files/20210902030307.pdf
    • http://polins.org/public/userfiles/file/87538915258.pdf
    • http://bajkolandia-leszno.pl/userfiles/file/10803919074.pdf
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/kozevidisoxorovosapo.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7cdc8c847dddbc10053c7a6441546243/zupetoraruzesozetinod.pdf
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/dofetuzuwim.pdf
    • http://happyhanool.com/ckupload/files/23553146536.pdf
    • https://editions-tlp.fr/ckfinder/userfiles/files/witigemenurokoluw.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ef9aef6f6---31084482090.pdf
    • http://zoekidsworld.com/userfiles/file/rudirezoxexawilido.pdf
    • http://cartonwrappingmachine.com/userfiles/file/fizozelaxekag.pdf
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/vofujuva.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF8 16792 bytes
font_01_sfnt_off0000e70f.bin
600188cfcd754e3cb3fae96eab9da775e9a6a4908abc6eebca5f12434e8cf527
pdf-font-stream PDF embedded font (sfnt) at offset 0xE70F 11520 bytes
font_02_sfnt_off000101df.bin
1be55751e103f8ce1e1dab503f57e1afb33f7a484024e72c72456793e9f43e8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x101DF 18648 bytes