PDF malware analysis — malicious · edb2d39f18729189

MALICIOUS

PDF

78.2 KB Created: 2021-09-04 08:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: dd2a017d4a48bf574b9961e465f4adc7 SHA-1: eef42da01909d9379f5c2eb847cac63e395d4b0c SHA-256: edb2d39f18729189f5fda1d84c424453ae5e163770adcc25aa5579d75ea8a38d

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. The document contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/77266f9524c67e799e1a9ae0b53937df/ketijogefab.pdf In PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c161299c235---85432642899.pdfIn PDF document text
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/da20096a74a328c82e532ac33659876f/mazufudo.pdfIn PDF document text
- http://amghanoi.com/images/ckeditor/files/50168230233.pdfIn PDF document text
- http://micronforgacsolo.hu/UserFiles/file/wubofobov.pdfIn PDF document text
- http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/murogatesizakapar.pdfIn PDF document text
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c35f87a35---58990427298.pdfIn PDF document text
- http://bluebirdcanada.com/FileData/ckfinder/files/20210720_522AF9EA508CF9D4.pdfIn PDF document text
- https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607267f239c59---sidexo.pdfIn PDF document text
- http://studiotecnicomartani.eu/userfiles/files/pibimowawejuxob.pdfIn PDF document text
- http://ghalemdi.com/userfiles/file/goxoz.pdfIn PDF document text
- https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086543cdae1f---gifasanopewepuxorukuzu.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c02551aff---65503123426.pdfIn PDF document text
- https://khotelmarket.com/FileData/ckfinder/files/20210731_847635D575E72587.pdfIn PDF document text
- https://ichibaninfotech.com/ckfinder/userfiles/files/29291478239.pdfIn PDF document text
- http://salukool.ee/upload/userfiles/file/6796104854.pdfIn PDF document text
- https://termofriz.rs//files/vapojozedudomefojike.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/6306d657e7930c40d457af54be4600ba/47649297819.pdfIn PDF document text
- https://lifo-sea.com/ckfinder/userfiles/files/tunafa.pdfIn PDF document text
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/hgdskmb1cu7o4lrjig257hus73/39123323572.pdfIn PDF document text
- http://www.blueoak.fr/image/file/goxomaxurusovajaro.pdfIn PDF document text
- http://gimnazjum-krasiczyn.pl/img/userfiles/file/kolumudeluxujoke.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a46248c9e---getidebarise.pdfIn PDF document text
- http://synagoge-stommeln.de/ckfinder/userfiles/files/56598286003.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ce90efac5---rilido.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=balancing+redox+reactions+worksheet+docPDF 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_off0000cbc8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBC8	10980 bytes
SHA-256: `9c46eb04f85357037fc95ca9cf35ed949f9002f78598c59f7082a7f95cdc0acc`
`font_01_sfnt_off0000e51d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE51D	18032 bytes
SHA-256: `be347fd56663078315e24a0e57dd4649cacc5a91d9584a0d17aa14bac6f8aadc`
`font_02_sfnt_off00011381.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11381	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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