Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f13f039713a39e2…

MALICIOUS

PDF

102.0 KB Created: 2021-07-15 11:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5059fc9359636a7889e065ab910ec44d SHA-1: cc52f1e2fd01cc92fb0718a6f4da1c510592e08c SHA-256: 9f13f039713a39e262a3a947a0d32753bf89f2fafc0be2bdbd4ff6ac565e6801
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, but the presence of many external links strongly suggests a phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088191f78b66---46236445945.pdf In PDF document text
    • http://gtshotel.it/images/file/29230524286.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/xidusaxafox.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2062a9f69---vonapajoxekijefi.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/70408704927.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/be3fecacef7ddc786fcabeb43ffa7e6e/dukazoke.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/efe8445f74f97003f2d74ca2b680fd04/pefatapidupisezikuvajabuw.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/zapisonopapi.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ei38riqkr0nh2jrmhk4drtp7hc/10508858936.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/fudinuzibifuz.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dfdf6f0d7---nesemebapalitugosil.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/47067267023.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607544589be00---narubodukobudebi.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/32756331326.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/kepazesagilojawiwudijuba.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a054cf1d46d---vujusoxifinigexefap.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/besusorovudejagirirofuv.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/pomaxale.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/7f4llhde84dl9drpoh00binh0d/luxevifunotegibabotovo.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc717361c---laverilurele.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/97148380528.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/gei6jjd19n82da7l493v7tu32e/36065962050.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/76373555050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bless+you+and+keep+you+kjvPDF 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_off00012fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE8 16588 bytes
SHA-256: cc39d120d2c9cf7c7bea50718eea1abb36ee3875e8ac0e8be26fa87ba64712ce
font_01_sfnt_off00015a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001727b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1727B 10652 bytes
SHA-256: 2d8d8f5124c8489149f283199de58b9a2914e3381a10bf984ca76f8027efc490

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