PDF malware analysis — malicious · 14fed1f45744f669

MALICIOUS

PDF

87.3 KB Created: 2021-07-03 00:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 8860957c73facfba2d2ab6558b235da0 SHA-1: 68eb63de3b5650c6f3ede78c17b477fa508ec0ba SHA-256: 14fed1f45744f669b5fa48aa77a8ec0de0e1b2f8bd4183cf6d3e836f98e9ef27

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is identified as malicious by ClamAV and an ML classifier, and it contains numerous URLs pointing to compromised WordPress sites. These URLs are structured as a link farm, likely designed to distribute further malicious content or phish users. The presence of multiple PDF files hosted on these compromised sites suggests a campaign focused on distributing malicious documents.

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 http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908dac4959f---nusedojam.pdf In PDF document text
- http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/0j0b3b4b4jp551839rc7ajb4h1/26061730112.pdfIn PDF document text
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ama6oc3ad6fpk7me3gjcsjhmd7/16298456575.pdfIn PDF document text
- https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/4f91625fbc58f48a0844151a2c227f36/vozagiwuxexenedaneg.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b216248a515---pokes.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/bdea9726a192a11c0807f6639ec4564d/38450275104.pdfIn PDF document text
- https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/c7963665a00254fbe626756562404126/zelinoleneravem.pdfIn PDF document text
- https://atcotourismtravel.com/userfiles/file/xifub.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98a5447dcf---52283915446.pdfIn PDF document text
- https://tanasiri.com/piceditor/file/47883363958.pdfIn PDF document text
- http://www.sec-ollivier-associes.fr/www/upload/file/8151466776.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/m1e52e4oh1tf94d7bpf16geb83/56810710647.pdfIn PDF document text
- http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c52624cf72f---negopumekolel.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c8c50503b---98919877766.pdfIn PDF document text
- https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb281cfffe---xuzafa.pdfIn PDF document text
- https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/ab85c2b7016a50ced3f04dca1730de4b/wuxibibifatuki.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f9432fe9e---30725508181.pdfIn PDF document text
- https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/8de21267d808e636e12b31db96649219/24895485421.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b36cd7e4ec2---78648923465.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95df74a8f---4960331061.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b186f2584---2730564640.pdfIn PDF document text
- http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/646b5b3c891dd9acb09e55be2b0eab29/76268364668.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/cfck2ehntjqoccheb4va9eh7v9/pebefeve.pdfIn PDF document text
- https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/978f6ec3c6e46c7c904e7e0c4c32b282/61966638460.pdfIn PDF document text
- http://dges.in/userfiles/file/zaberulefomasikeg.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=outer+banks+average+temperature+by+monthPDF 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_off0000f0ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0AB	11096 bytes
SHA-256: `0baf434b8cccfe99f588cbff88821414fff35128ca5f893d34de092c3cc8f34d`
`font_01_sfnt_off00010a4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A4B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001225d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1225D	16836 bytes
SHA-256: `20740a5c15a7fc21689741e7cef974748151a0645d175112d59783ccf2e2ea1e`

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