PDF malware analysis — malicious · d0bbbb2124c9b702

MALICIOUS

PDF

86.6 KB Created: 2021-07-18 16:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 6e251f67dd9bfbfec5aae3e7ba403112 SHA-1: 8a314a213c7f6ea6421e72dac576d84a69df5b4f SHA-256: d0bbbb2124c9b70229085e3f0367c9caca31a0ec2f9e2804fa5618e6dbae2729

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised websites, likely intended to lure users to malicious content or phishing pages. The PDF structure itself does not contain readable content, but the embedded URLs are the primary indicators of malicious intent.

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://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/c06a78c9b1c793270eed060ed7882c57/tigusoxipazavuje.pdf In PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ettou8263tdmlgjf9iul5heaui/7137031703.pdfIn PDF document text
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16094cad4543f4---7430223628.pdfIn PDF document text
- http://altaprecision.com/userfiles/file/3880090879.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/pald7c7fvvd8885q95aeo35mg6/jufukorewafekisal.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/relokuwapumazi.pdfIn PDF document text
- https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/64c771cbbc1369ba82be1245cb4809c8/fikufifirukon.pdfIn PDF document text
- http://dinskayarealty.ru/media/file/jujajorotedufuf.pdfIn PDF document text
- https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4d30c2e1f11d76d6e5da9555c0d79830/zuzujafaxijoletolo.pdfIn PDF document text
- http://jagodkaprzedszkole.pl/userfiles/file/67584189526.pdfIn PDF document text
- https://adian.eus/files/galeria/files/61705083793.pdfIn PDF document text
- http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/lcfeg55gbt7puul3b0rcfh118f/4541056038.pdfIn PDF document text
- https://tlproduct.com/userfiles/file/zidabarofuv.pdfIn PDF document text
- http://studioguagnoni.it/userfiles/files/72194108105.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6442e2641f---64433830185.pdfIn PDF document text
- https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/scss60175nff9racif254vk41s/befarisufuxasuzupodoxeb.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097c4384551d---2537433173.pdfIn PDF document text
- http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd9a628327---sunorozat.pdfIn PDF document text
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c9aed80c0---mujimamixojafubotugimim.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9e0c4a6bc---9846781309.pdfIn PDF document text
- https://berettyotv.hu/userfiles/files/zejevitukibazamisunumo.pdfIn PDF document text
- http://czdashan.cn/uploadfile/file/2021050405484773499.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1645d4e1ea16e8c19de8b1fb90850ac5/3065638693.pdfIn PDF document text
- http://nature-revive.org/files/file/panafafobazuvu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=where+was+the+steam+engine+inventedPDF link annotation
- http://irodori.kir.jp/files/file/joleru.pdfIn PDF document text
- 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_off0000f2eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2EB	10676 bytes
SHA-256: `fc55379ca0e7cec9684b885554bda2de232e8ecf63e61e300808d5202cfe3917`
`font_01_sfnt_off00010b18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B18	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001232a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1232A	16120 bytes
SHA-256: `c41d3fd2854e49694dc66ff2ccc44c38a842dbc5fc7702b0022223e8968d8940`

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