Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a45859e4447b3eb…

MALICIOUS

PDF

59.9 KB Created: 2021-06-08 01:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c644adf142b7219ab485fcf782e23eb1 SHA-1: f176cafbccaae54217afb42ddad1dafba9b681f5 SHA-256: 0a45859e4447b3eb4783c0d1d771669e2e996774a64f803fb1d7815d6c6e2767
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of a 'fnaf sister location free download' lure indicates a social engineering tactic to entice users to click on these links. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to host and redirect users to malicious content, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9570

Heuristics 5

  • 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
  • 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://nomylo.ru/uplcv?utm_term=fnaf+sister+location+free+download PDF link annotation
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608382e38f922---tukenadurowuzutomeforupa.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/b19e376c414ff5d4b0e6c20746339769/6731050466.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081f3d4b9ea9---49549268574.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/h9aa3invfh1ketocbaud32hjri/28291917220.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/5d389774ba3e198608597d8279bd0b6b/nemifuwerawamo.pdfIn PDF document text
    • http://drironcat.com/images/file/66599291843.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab995ae3b---9236448837.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a2b748535---32148221721.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160905eddca47d---99366953894.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/32874280910.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/437d142e01970e02550729c32b9445eb/pokofirumafoxedeloxa.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/da12c63234c1b5ff9e4b6c6f46544d75/90540477805.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606efb123cc02---jidamivivi.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607cef169290d---tilol.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/2123776274.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/nuxasujulamo.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/sexeziwutorikigol.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/91820539003.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19C 5064 bytes
SHA-256: aa914f1d7fdbebb915a25f48be57696655cba77ba4b324f20a77e8f70d1780ac

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