Malicious PDF — malware analysis report

Static analysis result for SHA-256 002a2aff2162c2f8…

MALICIOUS

PDF

105.0 KB Created: 2021-07-08 03:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 480758d9dd67881b8957f8daadd04c94 SHA-1: 821772e015f7afa534665c16b9755aabe965b8f8 SHA-256: 002a2aff2162c2f8fcd92995590de77605b08b6fc6e9942abd62e1e9d51f964b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload storage and other disposable hosting sites, suggesting it functions as a link farm to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb98846148---wugodikomegusevopo.pdf In PDF document text
    • https://acronimocostanzo.com/userfiles/file/77632777299.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/df52093494edb4c88601ea80521c4e92/36766249696.pdfIn PDF document text
    • http://aimic.com/userfiles/file/laripolosenitaxedufi.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160ba85852a561---80304709111.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ce2hrjso5el7r0800eii8eoj20/57954206263.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/16df55b8240a0cb573e24871aa5e2ec3/dofewerikukina.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/27684064416.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16078615c9b2f2---gigodasefejawiloj.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/a1bb84cb1d16cefa76e5e236f4bdd8a9/61769661063.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609135b62ca4e---78137094252.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609540e094670---ritibolabazun.pdfIn PDF document text
    • https://x-software.cz/data/file/11976888984.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/46692204670.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160840e950b6ea---89255731947.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/59189391050.pdfIn PDF document text
    • http://landia-print.com/pdir/file/95366513409.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202106/1624004538.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160774cfbaf92e---vuvewetulakojosudafo.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/049229d46b08883e4a5e3fedf66c79e7/pinufomadavuxodon.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/mekuresujuzawerujan.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a077067bf75---18858715296.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/wazubepilumekedavotobobeg.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56f93e41e3---74128828566.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b416e1588---genoxorukewefep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=restless+ranch+poniesPDF 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_off00013720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13720 17488 bytes
SHA-256: e971112398aa935c046bef2e19b1ef53471148cfb2b7cb56c22280b332120ce1
font_01_sfnt_off00016557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16557 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D6E 10516 bytes
SHA-256: 2776663d63921dd82a1414a642067f98dd24e550f0095cf15ef93a2ff480686a

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