Malicious PDF — malware analysis report

Static analysis result for SHA-256 968ddf32d14069d9…

MALICIOUS

PDF

89.5 KB Created: 2021-06-25 22:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d1b15904af553e2b1fca1856fc75b50 SHA-1: 75118fb5ad104780664a323ad7897ce7e5bb2c1c SHA-256: 968ddf32d14069d96cc8c6e7cdfc4bf5eee97f17903cafe27451bc22bf48fa23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9ad85df0f---paketi.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/bqvm0d4b3lruc9seis2jt5k012/vugowixovugobibefuz.pdf
    • http://gorisum.net/fckeditor/upload_file/file/40337684396.pdf
    • http://profitoolinfo.ru/ckfinder/userfiles/files/belipizareneb.pdf
    • https://mldom.xyz/web/img/podborky/files/gobeluf.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8e28c437d---kovubaxabilurusirig.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/7eacf70e43848f51e33792dc356e65ac/22307879282.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/4d80ed663339266ac25954d77e7eb3ae/sopemekekugofekupap.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/a8q1ag9t9geuo13gi6c6ofur37/pavupagiwemozafezemuxowaf.pdf
    • https://kristinanamaste.eu/files/wamirovi.pdf
    • http://asijskepotraviny.cz/files/file/14380273993.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/02d42662f208000d0af99ba92299f249/99450039473.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/netanafuvezises.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8afe445ca---bajebofuga.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/4kiqg3isbndc3rlk4050r67nq7/dubupejur.pdf
    • http://stinpo.com/ckfinder/userfiles/files/76294061079.pdf
    • https://krassimirtaskov.com/userfiles/files/47062219085.pdf
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/70070056675.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609477200b922---vuxuvoruse.pdf
    • http://elementsgogreen.com/userfiles/file/14970612388.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ea688827d---65903749300.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/303ddbc2a88573753f81b362a3d27c4c/6608598785.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16093f625c3f81---2470033527.pdf
    • https://angkorphotographyguide.com/userfiles/file/10562766725.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d3e032b7f---tomeniromujutafogugafejo.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/45b8f3f4f2f4fc81fd9c3574e8db9f66/tuwoxujoda.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=common+conjunction+words
    • 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_off0000fc3b.bin
f30a78f6ba94b89c1db97a1a416c42aa9c5303aac816786bbd1ce749714eb3dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3B 16908 bytes
font_01_sfnt_off00012876.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12876 16792 bytes
font_02_sfnt_off0001408d.bin
16eababe53029c608104b6bffeaa95c2ccac4b2079bd686f605e55ab6a2a35f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1408D 10536 bytes