PDF malware analysis — malicious · 86a447d2ab7fed36

MALICIOUS

PDF

72.5 KB Created: 2021-09-03 18:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 912cc81f7453cc345d3d67918697eea5 SHA-1: c424f5da239b2fc8f91b5d253126d2fa98d85432 SHA-256: 86a447d2ab7fed360ac8a4330f44d5add635ea1efbf037d9123c424934191b2c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites and link farms, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/b9927974e2117969fcfec125725e765d/84699402009.pdf In PDF document text
- https://hirurgija.me//files/solodonokawo.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16073b4633c3cd---48979525487.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16089ea161d975---34615792529.pdfIn PDF document text
- http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/vcjq8667hflmg590gl6m953li5/fufezejugikuvudirovug.pdfIn PDF document text
- http://rhodeislandalpha.com/clients/56223/File/21698435306.pdfIn PDF document text
- http://ifa-astrologie.de/userfiles/file/99038585219.pdfIn PDF document text
- http://deurenhanger.nl/userfiles/file/teranitodujutudezet.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160824d886cf09---56532813152.pdfIn PDF document text
- http://supermarketdv.ru/files/file/39182968798.pdfIn PDF document text
- https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d1b8a944711d29512bdc7ea449218fe7/48443037035.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9709ac243---93899253224.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a31ea10dbf---zorokis.pdfIn PDF document text
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa13dbcebc---12212068016.pdfIn PDF document text
- http://apisicul.com/userfiles/files/bewozatifeluta.pdfIn PDF document text
- http://020tzs.com/baige/images/userfiles/file/89338572057.pdfIn PDF document text
- http://sakuragiramenandsushi.com/uploads/files/pipapovasit.pdfIn PDF document text
- https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/cba7f7e1ab1af4484e97d5c1d16a86a9/11859991500.pdfIn PDF document text
- https://ispartaorganizasyon.com/ckfinder/upload/files/bunavi.pdfIn PDF document text
- http://blesk-stroy.ru/userfiles/files/diredurep.pdfIn PDF document text
- https://dalilak1.com/userfiles/file/bofaxineb.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/3cea78d3abe1ff3d3a2f75f8b968b0b0/saruzajovegetozubebebev.pdfIn PDF document text
- http://al-farh-iq.com/upload/userfiles/file/20643122477.pdfIn PDF document text
- http://angelescare.com/userfiles/file/74139084944.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/3835a365898b132b46f7f92586c8e676/39407634717.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=prokaryotic+and+eukaryotic+organisms+pdfPDF 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_off0000b64b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB64B	16944 bytes
SHA-256: `24fce333430e052881bc44f9676ba93dc95a1394cd25cc740e4ad862433eb15f`
`font_01_sfnt_off0000e24d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE24D	11224 bytes
SHA-256: `05019167487fb8dd14cfd26db3dc38f711d57bd44bec910f4c4a517ace6491d7`
`font_02_sfnt_off0000fc79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC79	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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