Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e92938d2166cca2…

MALICIOUS

PDF

89.9 KB Created: 2021-09-03 09:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d917aab5ebbfef6d6c949a3e80a9d74b SHA-1: 00131c63952d4a1f2ed5a1171c8733c092ff91bd SHA-256: 9e92938d2166cca285785725e1cc7d80e606282ef9e1a15b550a76ab6ee0af34
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of urgency language further supports a phishing or scamming intent. While no scripts were explicitly extracted, the nature of the links and the detection suggest it's likely part of a phishing campaign, possibly using embedded JavaScript to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://chcial.ru/uplcv?utm_term=overview+of+blood+components+and+their+preparation+pdf PDF link annotation
    • http://fotosvatba.net/userfiles/file/10298086530.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/rtsg5eej9a7rvm9fjpa3eogok0/47715733720.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/nobas.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/277bf3b7b44782c0a7e7893d03269060/3603088795.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021070918580773499.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/d069jfgoofjscr8makuef9cbu4/1494997244.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3dc8661e6---zadogovisizegisipo.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/72539386419.pdfIn PDF document text
    • http://deauville.ru/files/file/99645266721.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/88330519041.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a66ee497c---kotimonezajusutiketal.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/42752118853.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/lozekefetitared.pdfIn PDF document text
    • https://eniedu.com/data/file/20210807153547.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfaf654d9f---lolopogaduzeker.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/61305507273.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608485fb6af72---60527426846.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/deragugizofiwojuku.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/47111249325.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/s37m95m4gols9oqccah6uiek2c/sumejovikategenojonuzimal.pdfIn PDF document text
    • https://nurea.se/currency/userfiles/file/ziwolitirovo.pdfIn PDF document text
    • https://cargobull.cz/res/file/segebaw.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/fubugunoramolutamireb.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/cc2f5a4793a418e64076a905d3df1538/87721157692.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/tasusedinorumaxavofudex.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_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 11200 bytes
SHA-256: 3b24650aa829d5ea9dcc1c58340741eec4fbd3f73feb51019bd1a2fc40654458
font_01_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 18784 bytes
SHA-256: 4ded3ac863274206ec41202a5d9967790de950bbe3bce8c543fd121674439742
font_02_sfnt_off0001419e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1419E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1