Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b51bd8bf29de26…

MALICIOUS

PDF

108.5 KB Created: 2021-07-06 16:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3842ccf3cdfe964ebdd2ec7958b0bf5c SHA-1: d0d137e368365c18230af8b26b6110965716272b SHA-256: 32b51bd8bf29de26a610fb64428d439b2d3ed8c1f39f012166da1ea31e0e74ee
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on disposable or compromised hosting reinforces the phishing and distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://euro520.net/userfiles/file/1625353818128764781.pdf
    • https://foundryindia.org/userfiles/file/lotasonafunoja.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc27ed57943---81523186971.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3abc1c57a1---39475498685.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a001fa6c65d---84926868992.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960ef801200---3694539903.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/09589aac78234a503f294e3080c9b4c0/rakiteken.pdf
    • https://moto-trend.cz/public/files/fck/file/fovuvudobuga.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/22596d8e0a5a428c51f789c2fb1f09c3/2249001597.pdf
    • https://accuratesearch.com/userfiles/file/98844639434.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801ac89248b---rujixalopak.pdf
    • http://stavebnevyrobky.sk/www/upload/files/jipedozixesokogutig.pdf
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/nimakixunax.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/44e64a91e6ee5e891815a038424d2c57/forupelonimipebodana.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608077bcdc266---61221953077.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ae1dea179---8987182661.pdf
    • http://ewhamd.net/upFiles/ckeditor/files/bideb.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160990a970f782---mijajixujizisepazu.pdf
    • http://stananddiane.com/clients/6/67/672a2699e369d648dd23e03de9deda78/File/napijunu.pdf
    • https://robertbah.si/files/file/90625195457.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a4092f43f04b989fb62566ba712fce4a/71511420509.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210613_1D383418F8AC3701.pdf
    • http://kstarsmall.net/userfiles/file///33281473937.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=finding+lilith+in+birth+chart
    • 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_off00014673.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14673 16792 bytes
font_01_sfnt_off00015e85.bin
11d29e79208a83e12e43f82a19d04bd43c74335c7355d5e4ef4b8345710fc002
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E85 17552 bytes
font_02_sfnt_off00018c60.bin
695409df337c77c7ae81eba3d2aa4b9d8629dcec518ecc8af1da5c103efb7b34
pdf-font-stream PDF embedded font (sfnt) at offset 0x18C60 10348 bytes