PDF malware analysis — malicious · d6561e19b09fcdb6

MALICIOUS

PDF

82.4 KB Created: 2021-09-07 06:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: e2d6fc990da996aa48ef7fc6f67b8c12 SHA-1: f6b8d0c5d227f083029cb3de4d63de8ca66497bf SHA-256: d6561e19b09fcdb6d0fb9ef3d19cfbd0d2e9fb635330a44b10c7f200177214f8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160989954583ed---1468200696.pdf In PDF document text
- https://jokerprod.net/userfiles/file/18042049981.pdfIn PDF document text
- https://cribpointonline.org/cribpointonline/userimages/file/woteliwaralekupu.pdfIn PDF document text
- https://anandamsanyal.com/userfiles/file/vafimuluw.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3079944bf0---47859667893.pdfIn PDF document text
- https://www.sensiblemachines.com/ckfinder/core/connector/php/files/36643164833.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887a1258cc5---24709806458.pdfIn PDF document text
- http://dycelife.com/userfiles/file/kuwonemilotisiropurus.pdfIn PDF document text
- https://escaletravel.com/userfiles/files/4545106443.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9428cb1a15---kinopubemimagilefeparub.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094b9507bf92---tunupotolafagabojekopudu.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/f3bc7f58fc07a4ded4bc681a147f9aa1/vedemakosononapekefezivu.pdfIn PDF document text
- http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9a41cb269---45539890762.pdfIn PDF document text
- https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/928172ce7ee2b3dfed993df1b476d4fe/femaxeted.pdfIn PDF document text
- https://luminex.pl/upload/file/wazodemina.pdfIn PDF document text
- http://ibb-online.ru/f/file/tapevopovejenavokez.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/d39937089828dfa9666970db15a25e97/32705703391.pdfIn PDF document text
- http://deauville.ru/files/file/17085161142.pdfIn PDF document text
- https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e6afe10b89c0c57c0818e90fed68f731/57617361382.pdfIn PDF document text
- https://dailyhondaotomientay.com/upload/files/nowovejafigulofawumeduta.pdfIn PDF document text
- https://air-separation-supplier.com/d/files/jilufajuloxix.pdfIn PDF document text
- https://akproauto.com/nbloom/fckuploads/file/kiredine.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088088edf8d6---92344292671.pdfIn PDF document text
- http://erfaspot.com/resimler/files/benetedavurarimapap.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7c15c6935---82769798976.pdfIn PDF document text
- http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987ec635bf9---lilimexi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=repair+corrupt+pdf+file+online+freePDF link annotation
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000def2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEF2	10592 bytes
SHA-256: `7861cbc3ccd2e26e1146770629f4e73239818e2e14b31a4dc48186a37861c09c`
`font_01_sfnt_off0000f737.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF737	17084 bytes
SHA-256: `081552c5e189b77dfad274f0846d883c5f324c9909532f3a0ac355f0e6e0aa03`
`font_02_sfnt_off0001236c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1236C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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