PDF malware analysis — malicious · 95e953e510ad9cb2

MALICIOUS

PDF

82.3 KB Created: 2021-09-21 20:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: dcc885e7edd7c58311c6f26284b358f7 SHA-1: 54da99e1169ed6397f3fcb72e69cba4dffa6210d SHA-256: 95e953e510ad9cb278bfa9e7b0ce9d447cf2077538a37f65d5665a0095c3b870

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicative of a link farm or SEO spamming operation. ClamAV and ML classifiers identified this PDF as malicious, specifically as a phishing trojan. The presence of multiple external URIs and a link farm structure suggests an attempt to redirect users to potentially harmful content or to manipulate search engine rankings.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://ambulatorioveterinariorigolon.eu/userfiles/files/4512152733.pdf In PDF document text
- http://www.gulbaharsigorta.com/contentData/file/26944717809.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a45280d31---40782073441.pdfIn PDF document text
- http://yogo110.com/userfiles/file/41903842093.pdfIn PDF document text
- http://viettranslators.com/webroot/img/files/11608365365.pdfIn PDF document text
- http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/xejali.pdfIn PDF document text
- https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/lepiwu.pdfIn PDF document text
- https://kurishupally.org/userfiles/file/rigidem.pdfIn PDF document text
- http://reicar.dk/userfiles/file/fusogovikatititomusi.pdfIn PDF document text
- http://www.jfac.kr/ckfinder/userfiles/files/30786559860.pdfIn PDF document text
- http://iscyber.com/userfiles/files/tatiroder.pdfIn PDF document text
- https://prolocolidodisavio.org/ckfinder/userfiles/files/gonusalisivulujirus.pdfIn PDF document text
- http://kocavietnam.com/upload/files/47390197950.pdfIn PDF document text
- https://truckforceone.com/upload/editor/file/6236398757.pdfIn PDF document text
- https://eijo.in/ckfinder/userfiles/files/bekisobizisiret.pdfIn PDF document text
- https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/pnoii1kbfrkgdbsoe877s7n6kp/76987193963.pdfIn PDF document text
- https://perfecthospital.net/ckfinder/userfiles/files/bojejejumelitekazositepu.pdfIn PDF document text
- http://boxerdapolenta.com/cmsimple/images/file/raxeros.pdfIn PDF document text
- https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/aca04eae4bfc544959151d28319f21d1/8324060240.pdfIn PDF document text
- http://palazzodiaz.com/userfiles/files/88171461813.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614727a4a3eea---68546522420.pdfIn PDF document text
- https://nstoplana.rs/ckfinder/userfiles/files/talope.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614927fe23316---bemipejatazir.pdfIn PDF document text
- http://muabannhagiare.net/images/uploads/files/rebobur.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=train+games+simulator+online+playPDF 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_off0000dc29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC29	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f43b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF43B	17812 bytes
SHA-256: `29293f0c920a2d12371bbd7f7cf0745fd8a236451beb51d9cd627ad2f3410034`
`font_02_sfnt_off000122af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122AF	10772 bytes
SHA-256: `cf16ec5701892bb3543b7c522b9a053fc44a6314aa999f9495491f1f2cd3b1de`

Open this report in the interactive analyzer, or submit your own file for analysis.