PDF malware analysis — malicious · b2c1628801867c9e

MALICIOUS

PDF

126.9 KB Created: 2021-06-29 14:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: cf2c4baad81649278737a0edddc8d592 SHA-1: bff2979a74c346cacc173f8e49c4899a6be50c43 SHA-256: b2c1628801867c9ebace2fc6c480d45f7ba992f21427b9268ff814428eb48ead

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and potentially malicious content. The presence of these links suggests the document is designed to lure users to external resources for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9729

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://nomylo.ru/uplcv?utm_term=forget+in+arabic+language PDF link annotation
- https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adaee68778d---68861943917.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad911120e7c---28591928912.pdfIn PDF document text
- https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/dqurutlfu2sdes93iujejp18hi/fusavepibi.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/0063619436b0abc4176d1346c69a940f/39704793245.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af3d8608e43---8506474762.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a5e9fe43660f27b128058e5c112b4ef2/vatirafo.pdfIn PDF document text
- http://blackhorsesc.pl/userfiles/file/45393001880.pdfIn PDF document text
- https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/pv0j276b1hs5gd147lk812u611/24753006020.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609833cb73c34---tomudedujaladadaludev.pdfIn PDF document text
- https://mabuksusu.com/contents//files/14026817261.pdfIn PDF document text
- http://glina-master.ru/admin/ckfinder/userfiles/files/wotuferisadajazubirul.pdfIn PDF document text
- http://aldo-ins.com/userfiles/file/7174104508.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098c8a42f6e1---jugifele.pdfIn PDF document text
- http://phantasos.org/userfiles/file/pibele.pdfIn PDF document text
- https://mariellatriolo.it/public/file/55059966007.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/1ab58636a31a28861dc535d2ef75ee73/48613418648.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5e56056db---62275000143.pdfIn PDF document text
- http://hutergroup.de/userfiles/file/vikoleki.pdfIn PDF document text
- https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/855ff934067133d88f564de1e515ec10/davosavifoserugipokipibu.pdfIn PDF document text
- http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/6839621373.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a3904a09ad4ddf241a80137d91ca9a5e/46554138499.pdfIn PDF document text
- http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/5766616308.pdfIn PDF document text
- http://canigrup.com/userfiles/file/karujepofidufa.pdfIn PDF document text
- http://jhroseclassof77.com/clients/45984/File/boxujenipuxobejera.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/3650duvkgbjj30fleadd4pdct4/lirageki.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/sj5lkprbtdfciamjtjois0djl3/foxezowavebebiz.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off00016132.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x16132	27580 bytes
SHA-256: `cd6ded384846efa6ab8ef09a5c4f8984b808b733f40167ccba66df10bd3cf9a4`
`font_01_sfnt_off000192a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x192A6	17260 bytes
SHA-256: `10d236ea9dae9ae26a7620d90e99d278d517dfdcafefaceb63f40e3d2f99e060`
`font_02_sfnt_off0001bea5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BEA5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001d6bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D6BC	10452 bytes
SHA-256: `1428e3a262f39c09711ad131255798065f4f420009727655020f1f340d00c5cc`

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