Malicious PDF — malware analysis report

Static analysis result for SHA-256 410a7fede2a3c46c…

MALICIOUS

PDF

92.6 KB Created: 2021-07-16 11:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 11e2167a202f33916143a4aa40a85185 SHA-1: 702598dbb8ddc3b23c7f9e49733bf0dc5544dd41 SHA-256: 410a7fede2a3c46c2340dad1ceefecd1878f7aceb8bf7989f0181afebbdf1d82
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to lead users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=never+knew+that PDF link annotation
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/9c3547c7afeb4e20794f4ed64ff89e96/22118401109.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f82e42f0cf---dadot.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/81102693833.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/0eaa5607bd53e6bbc17206cb98b092af/42149412483.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35fb966a90---lilogoriwugebus.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/3m4f3b5mcvn1fmpqrul1e5657q/worupexemodimoxos.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/gafemutume.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/40728222000.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/merajubemajafaluremaxisa.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/37563410971.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/c93307f07b6c43f19e747634598cf73e/80198318857.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a56bda2989---32560596358.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/fanonivowazepebuzej.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/48984fd92ae62dfb0c5f499781410365/79218202397.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/tu59dr28hh5vmvsd1lsspgr9r8/28996941037.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/jemefutefobi.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/df68f404b8361d4ff43841ce160b3bf1/gavujiximamevopofejafeve.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/48352192427.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b93ff6ef131---kerozumuzejapufadas.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/12547111683.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/84665675041.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090751767a59---5168605697.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_off00010b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001238c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238C 16912 bytes
SHA-256: 6289aaed53f14da4e6b98d591fc581582734c335f742d498643290ea1aaa04a7
font_02_sfnt_off00014f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F72 10000 bytes
SHA-256: 95066ae5f0ea4031f327e4cf5faf462ba2c739d568c0c3a7aa1196ecfbf0e158

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