Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7233d92afbcd1c…

MALICIOUS

PDF

87.6 KB Created: 2021-09-18 19:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e35b1f2870a41cb863749c95998fb4e SHA-1: 9fae0cd0727d1d86ef5cc6061145ad3c01f5e304 SHA-256: 0f7233d92afbcd1c2efa219479ad5f4a981c80505b7a3da891d4d7bc82607fba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a malicious intent to trick users into downloading further content. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=find+my+device+apk+download PDF link annotation
    • https://iphastkala.com/userfiles/file/zatodezibudekadomevuwo.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/25389352931.pdfIn PDF document text
    • https://invest.pl/userfiles/file/64564310235.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/03ddc92098ccb9cdb3a6a4ba432320ec/fofuzixiwibazareruluposuv.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/bapuratimujotegav.pdfIn PDF document text
    • http://ducnhua.com/upload/files/fakeranisurod.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613afc264f23d---88903216285.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/4k9458upn4hr9tovovibvag7n6/54650084589.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/8759550726.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/32944258834.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/12969151048.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/587cef63756f414eb121892d7fa7997b/semorotegotikofadi.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/rixuwodirozawam.pdfIn PDF document text
    • http://fastcredit.ge/userfiles/file/wawogadapewilivu.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/92551917557.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16142d1494653e---44860016744.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/sepazubovawileperesisumep.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/92304659638.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/juzuturotibapotizufexo.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/nozumiboteriweponidireked.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1b49d7640---gonugozisumuzogedotikigik.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/likimizovegoga.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/51424328987.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/45910497075.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/vapulibujijixegekefavokik.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://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_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 18908 bytes
SHA-256: 2d9e013f93abd8c1760875aba202a649773ddda7394604b25afc790f717cdce5
font_01_sfnt_off00012053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001386a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386A 10644 bytes
SHA-256: 962516774cef7a3a14d2791a62ffc830d6a48e000ce01c03c2e8b5f8a8a301a7

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