PDF malware analysis — malicious · 52ea2b2ea5e33416

MALICIOUS

PDF

82.7 KB Created: 2021-08-24 02:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 70923984265f8706efe48392267fa018 SHA-1: 1600688b179b9158e66e5ecda14aa1aaa56bac4b SHA-256: 52ea2b2ea5e33416d63ab3a7cac7b2c05446371b06cf1e64f96448ae3e13c232

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. The file's structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://auxerretv.com/content/public/file/pozoginalikugu.pdf In PDF document text
- https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160877ba3e4daf---kebapulupetus.pdfIn PDF document text
- https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4a44b4e15---45906056932.pdfIn PDF document text
- https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2922ade31c---24683639115.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7b9b5817a---xesexokipiguxo.pdfIn PDF document text
- https://ibextrail.com/editor-images/kizijafizukor.pdfIn PDF document text
- https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/51c7480b6054565d55be2ab819cd532e/tofosonez.pdfIn PDF document text
- https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/fc8b875f0110cc596b224c7048f077d5/45421735856.pdfIn PDF document text
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608668446ddfd---4818407151.pdfIn PDF document text
- https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/2f549873b3393d5161e0a3cd06537b46/dovotopadilil.pdfIn PDF document text
- http://pointerboards.com/uploads/admin/files/dajudojunoxuzumafikomojo.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97abc43c6---narezemuwuponitawoxemuno.pdfIn PDF document text
- http://allamericannursing.com/userfiles/file/mezuvovikuxogazoxofip.pdfIn PDF document text
- http://animationcoach.com/userfiles/file/2167073785.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0afb884a76---nokifoxaweziju.pdfIn PDF document text
- https://limmaginebistrot.com/file/kaxanemepo.pdfIn PDF document text
- https://aadhaarretail.com/administrator/imagetemp/file/lafuxojuxujotika.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5999464b52---10555071890.pdfIn PDF document text
- http://uticachemical.com/files/upload/files/ribazilokugamudate.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077de831ef09---59992568176.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/061ba886eab2342fbd790f8a6243e182/kaluluzidin.pdfIn PDF document text
- http://chrisdepanneservices.com/Sites/cds/files/marujidumokabaxumuzeguwet.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fd04aa528---nigagivemofiraven.pdfIn PDF document text
- https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4446f232f014bc08ab9c85661de94bdb/4138092175.pdfIn PDF document text
- https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607158a75d6c7---27319802545.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=national+truck+driverPDF 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_off0000e344.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE344	16248 bytes
SHA-256: `b753140956f786a67dbf2be5985d9089922af3b097c66f9fabc940c0c42f5410`
`font_01_sfnt_off00010d84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D84	10432 bytes
SHA-256: `497442a973fe1215d67d433fa9c74d09f48d72b30e23284ad71b989ba075481c`
`font_02_sfnt_off00012550.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12550	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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