PDF malware analysis — malicious · 321624c203810232

MALICIOUS

PDF

72.0 KB Created: 2021-08-01 05:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: a20579b65b8a0e2a0b902f4c503e2284 SHA-1: 4df3cb8397e20d33edc931a4fa113cef9ac6711d SHA-256: 321624c2038102320f4c9e46e8bcf813fd96e265fb06c767f45ffe38bdc3c8c6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was detected as malicious by ClamAV and ML classifiers, and exhibits characteristics of a link farm. Several heuristics indicate the PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to obscure the final destination. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.5474

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://villapellegrino.it/userfiles/files/gezunifami.pdf In PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae343a504c9---xevenifotavivo.pdfIn PDF document text
- https://activepymes.com/pub/file/75320200679.pdfIn PDF document text
- https://matfreklam.com/calisma2/files/uploads/zipolegasul.pdfIn PDF document text
- http://sport-way.ru/img/file/31824176232.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41b9f74edc---1161265004.pdfIn PDF document text
- http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df0392867bd---48159701192.pdfIn PDF document text
- https://mangmalungtea.com/userfiles/file/66698711355.pdfIn PDF document text
- https://eccdc.org/application/webroot/userfiles/file/96876249127.pdfIn PDF document text
- http://bryanhigh78.com/clients/72554/File/saxip.pdfIn PDF document text
- http://alt-1c.ru/userfiles/file/matipezuwuwat.pdfIn PDF document text
- http://portalkucharski.pl/app/webroot/media/files/70833884383.pdfIn PDF document text
- http://thebookmarkcafe.com/uploads/files/tuzaniwovoganasitezuti.pdfIn PDF document text
- https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160786f09cf40f---5811911546.pdfIn PDF document text
- https://capecoralliving.com/media/file/mejolavunakonirudusibexu.pdfIn PDF document text
- http://valeneighbors.com/userimages/42082892220.pdfIn PDF document text
- http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/2flq7f85o6mflaerhbf0a2ipostcrfco/78119993265.pdfIn PDF document text
- https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/6ks707djjn05384pfmb0vhthj2/80493821599.pdfIn PDF document text
- http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16073bed000c0c---36024112575.pdfIn PDF document text
- https://ferado.vn/userfiles/file/kebazuganupikebexi.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/tufudit.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/p4i9snkbd6bg7nme0jb8ht27b7/56425738941.pdfIn PDF document text
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079b703e4fef---wumew.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=reflection+and+rotation+symmetry+worksheet+8PDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e7a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7A0	11284 bytes
SHA-256: `f4020a13fe02907aecba40bbde651fdb4f37ce28009d913646cb212be26150f3`
`font_01_sfnt_off00010209.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10209	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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