PDF malware analysis — malicious · 5f5f6fc3229cac9b

MALICIOUS

PDF

88.7 KB Created: 2021-07-09 09:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 4abd092ffab1495b3a2fbf06b1e23cd5 SHA-1: 84013b143e39f24b1f1c2023e60bb27f571062dc SHA-256: 5f5f6fc3229cac9be3e6177a7fd78f97ac2b3bffe4601f342382432831232581

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the link farm structure is indicative of a phishing or malware distribution lure.

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://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc458467fad---bomamoridurilijabeb.pdf In PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/bc620c5f0247aee7ecadce1f07368fe6/37713737915.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8b281f4f1---6133544556.pdfIn PDF document text
- http://campingwithconvenience.com/files/files/20745859860.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5hqfhhn0f9g90vdmqfjt35t4p2/tagoxesajigemubepopeditap.pdfIn PDF document text
- http://happypalettebnb.com/CKEdit/upload/files/xuliga.pdfIn PDF document text
- https://patc.fr/imagesfile/69265568598.pdfIn PDF document text
- https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/8d0709c8d6d15a24fc436c08324d5afc/77837405749.pdfIn PDF document text
- https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/da54061bbe7584ca6da84e9a697579cd/gusekaw.pdfIn PDF document text
- https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/2rndpv9chhqu6j9ie3fcruvvmp/6738098154.pdfIn PDF document text
- http://allasclub.com/campannas/file/buvewobabadidumutonuru.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/58a61ebf9c5ef58ed0ff9c2b5463c5d1/12091719426.pdfIn PDF document text
- http://allasclub.com/campannas/file/nupase.pdfIn PDF document text
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16073d47755d51---12814671542.pdfIn PDF document text
- https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb768a3d74d---16651835665.pdfIn PDF document text
- http://gilendor.cz/userfiles/file/63517825624.pdfIn PDF document text
- http://reicar.dk/userfiles/file/28651469955.pdfIn PDF document text
- http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160717b29f319f---fepizaweropes.pdfIn PDF document text
- https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c0f418266db05b851350ca039a5f91ec/68869732874.pdfIn PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/7e9e863f14a537e94c313b5dce2623d9/vebidosi.pdfIn PDF document text
- http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6fda9e5ee---30421755428.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c3ff5572e---xexoxugamonitegored.pdfIn PDF document text
- https://purefeeling8.com/data/file/35523948949.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4455b9347a---jemeb.pdfIn PDF document text
- https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/g71a2jrvm406v5992h09er4t42/lukakogojosel.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=rate+of+ice+caps+meltingPDF 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_off0000f72d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF72D	17792 bytes
SHA-256: `1e2e0fc427164b9bab5a817ef24aa4ddb907738f68bf2fc6c79a097c865042f6`
`font_01_sfnt_off00012508.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12508	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013d1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D1F	10768 bytes
SHA-256: `b0baa5c6983fe8f93864f1e22a009ac7dd80517095f778a881fc7e2db41703dc`

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