Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2a49beeb2075fc…

MALICIOUS

PDF

79.5 KB Created: 2021-09-06 12:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b535bb21fca9fa2107af196a784e26a SHA-1: e9ab496d4d01ea91828759a55836527b99cd5114 SHA-256: 5c2a49beeb2075fcc6a6c26371de4e3719c073b6162daeae31a3ee16ae9570b3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e311e2e2956---retesoretuwesuju.pdf
    • https://ratco-hardware.com/Ups/files/mujadusalumunodekiwusifub.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef71278484---rumixaradozelizifixopowoj.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161353271b579e---63176365037.pdf
    • http://sllight.ru/design/img/upload/file/vuxebabonixemovoban.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f152210a44---34236316149.pdf
    • https://fototipia.hu/files/files/83927046974.pdf
    • https://doluhosting.com/calisma2/files/uploads/mapumevokafonajifawani.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/b31ffe243ccd84d63de0a2ca24ffe4ee/wijubasatebij.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/65b78f8ef47e291589aee3b6c9e10c19/27867727575.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/90ei9dlge24djmm4tmpjvumlm8/56912015209.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124d22f0a094---21094046307.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/3rp4hq98nvp3vdm9hpeth97tai/pifekutilo.pdf
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/30847642451.pdf
    • http://vanxuantravel.com/upload/files/malobit.pdf
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bexufowab.pdf
    • https://e-ssuances.com/ckfinder/userfiles/files/52039357733.pdf
    • http://atek-ent.com/upload/file/surefasodafo.pdf
    • http://stin-verdon.fr/assets/Image/files/jipanovexizatugiwenabug.pdf
    • https://bushregenerators.biz/userfiles/files/funulaxuteweruxuxubu.pdf
    • http://alexlunacoach.com/img/editor/file/tagiwewuzetakalugef.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160795eadd6f88---82886656195.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7696ad4c2---pilodomubutudar.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f584ea1c2---4094197579.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/8bfc174f927daed4af5ff18fa6fc1dbd/vuwawol.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=question+tags+exercises+advanced+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_off0000d09a.bin
7e9c05847b6240711202bcc5d55e546ce4dec496276e09e2024a91801df2482f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD09A 17636 bytes
font_01_sfnt_off0000fe24.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 16792 bytes
font_02_sfnt_off0001163b.bin
cd08cc3d082a3231cb994b796472867380b2d15d930f98626a1605d4743259c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1163B 11076 bytes