PDF malware analysis — malicious · 0f59c59a5d12b585

MALICIOUS

PDF

90.8 KB Created: 2021-09-04 11:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 2ef2b16fd93e54e7ce61bc129349da30 SHA-1: bdec8f3b5ebb1eb530b443a0937f08912004a3d2 SHA-256: 0f59c59a5d12b585d3b8aceeca16b32266a84a0390ebe3601a8b557cdf880879

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations. These links likely serve as a distribution point for further malicious content or phishing attempts.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827d2864ff4---96556946161.pdf In PDF document text
- http://staropolski.net/Upload/file/wegilu.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607541b923e03---98298199503.pdfIn PDF document text
- http://wintec-samu.hu/uploads/files/75151152220.pdfIn PDF document text
- https://nic-irq.com/userfiles/files/toluwogonosusapenig.pdfIn PDF document text
- http://shuswapladystriders.ca/userfiles/file/gulifej.pdfIn PDF document text
- https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/f8842f9e5f812d71e06f40f8b2e7428f/rujojaruzujidokomogud.pdfIn PDF document text
- http://aroma-es.site/yamituki-n/uploads/files/33214608226.pdfIn PDF document text
- http://abogarestudio.com/userfiles/file/befujajigemoxukip.pdfIn PDF document text
- http://ekolojikweb.net/upld/userfiles/file/34913432400.pdfIn PDF document text
- http://dambi.pl/userfiles/file/sunanekerirofonoxazela.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5ae2a610d---powofoloxon.pdfIn PDF document text
- https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/l4o7dbf95gtsdm64dj0udqag3s/velijakowid.pdfIn PDF document text
- http://lso-msm.fr/userfiles/file/60442472414.pdfIn PDF document text
- http://hengtongrongshang.com/jingkelun/userfiles/files/20210819055321.pdfIn PDF document text
- https://alusol-kw.com/ckfinder/userfiles/files/3544165159.pdfIn PDF document text
- https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/r6tit7g2s8qel0b305av452bou/wejaxazovixelal.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16074f9c8468b3---12711995034.pdfIn PDF document text
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607608bade2af---zunaboloweganoxexevej.pdfIn PDF document text
- https://hpsoft.shop/upload/files/47757438961.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b13899cf4f2---xamewadunaro.pdfIn PDF document text
- https://hoongnau.com/upload/files/94780423090.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/6a3c8367f497364d26b3023e26d2cac1/pedinofalazuzul.pdfIn PDF document text
- http://shepardinteriordesign.com/rw/upload/file/gawubomopunamakugutise.pdfIn PDF document text
- http://basyapiemlak.com/yukleme_klasoru/userfiles/file/vufodomafibe.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=telling+the+time+speaking+activities+pdfPDF 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_off0000fd51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD51	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011568.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11568	10968 bytes
SHA-256: `737c1c1c713a3835ea0d2c858037aec3f0258c3cda3227e15feae8da51d5344a`
`font_02_sfnt_off00012e7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E7F	18272 bytes
SHA-256: `207921e9fbc398d3cbc90d05d2dd39f00cb4a7e4d1e4d1a265d7cc6247f1a273`

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