Malicious PDF — malware analysis report

Static analysis result for SHA-256 052212622714820e…

MALICIOUS

PDF

75.2 KB Created: 2021-09-13 18:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6ae7866d2d3fa829e3689c16ce4c741 SHA-1: cb5dbaf02d1b602910895ebc835fe5464ad8f442 SHA-256: 052212622714820e750b3be495609a7330e1a5af6777c8567192e01c66f7bcd8
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a 'download' button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gowowdeli.com/uploads/files/nupuwexawuvupevuremur.pdf
    • http://vuonlan.vn/data/upload/files/49810512049.pdf
    • http://mansiya.com/uploadfile/files/dumipipinasupegoj.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f10fc7c0e4---vaxiguninesu.pdf
    • http://newtrichur.com/userfiles/file/gabudi.pdf
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/tododajagudowomo.pdf
    • https://oriental-kitchens.com/userfiles/files/zopekugisibibogo.pdf
    • https://tch.lu/files/files/5123056851.pdf
    • http://sichera.eu/userfiles/files/71631924504.pdf
    • http://investbuild.ru/var/upload/file/zepomusop.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161363d02e1776---ruxowarolebe.pdf
    • https://laser123.com/geektic/files/sazopolesimedi.pdf
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/labukivaj.pdf
    • http://hotelbasantresidency.com/uploads/5874103770.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/86tp6hqggdkp7k3sjisdulle9p/zizidizeredaxugigebudat.pdf
    • http://bularz-auto.pl/images/userfiles/file/jakevetekez.pdf
    • https://mimpidia2.com/contents/files/tedapozol.pdf
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/tenukerukekudasepumepubo.pdf
    • https://taybaite.com/userfiles/file/wemotojimolazabor.pdf
    • http://bidadapatidar.com/userfiles/file/23289206020.pdf
    • https://ekransamara.ru/files/fagoxenevazurowipizivazu.pdf
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/98387352631.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=redmi+5+plus+miui+12+android+10
    • 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_off0000c195.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC195 16792 bytes
font_01_sfnt_off0000d9ac.bin
bdc94fb32fae7eafeabca3fa06f973e9b3160a8a862140af7db987af6624c745		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 11028 bytes
font_02_sfnt_off0000f354.bin
a1258485b0805e1ae927184d440d61750f425f11ebad4fe60d52dc8dcdc34441		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 16688 bytes

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