PDF malware analysis — malicious · e855383a4f6aa6e4

MALICIOUS

PDF

78.3 KB Created: 2021-09-06 02:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 40d13a9e04969eb3f569d680b3e8a7b4 SHA-1: 34fe0156745d0cd802b09e18aa2385753ca19cbe SHA-256: e855383a4f6aa6e48267a4cc894563dce80bc0bcd3a14b62469f992afa3d83d5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate it functions as a link farm, with ML and ClamAV flagging it as malicious, specifically as a phishing or trojan. The presence of external URI links suggests an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9844

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://infrive.ru/uplcv?utm_term=manufacturing+engineering+and+technology+pearson+pdf PDF link annotation
- http://scuderieverdina.it/scuderia/userfiles/file/ratujezomodigupi.pdfIn PDF document text
- http://www.aportecnica.com/imagenes/editor/file/89904375913.pdfIn PDF document text
- http://unicaconsultoriarh.com/images/files/vonevogodudikaxedifatagut.pdfIn PDF document text
- https://demetraproject.eu/ckfinder/userfiles/files/guwevixojebuku.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7903475098---gubiluvuregubezogutidoxa.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a597021eb1463d82661f8747371c1bcc/42540522038.pdfIn PDF document text
- http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/jb8cgtd1r2t4dps2jjhsu91bl2/sawebusifasamoripuwewabe.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a0c13bc78---97149698479.pdfIn PDF document text
- http://imcborivali.org/userfiles/file/72055309756.pdfIn PDF document text
- http://studiotecnicopinto.it/userfiles/files/49346832109.pdfIn PDF document text
- http://casaatlantida.com/userfiles/file///14124361046.pdfIn PDF document text
- https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/pgdagcf15miv8fiv5ubq9uhnrk/35731402520.pdfIn PDF document text
- http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/mexasezabite.pdfIn PDF document text
- http://adhdesign.de/userContent/files/20210821021148-duxekowumiwujaduvivot.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ff2acedcd---xobujexosodijo.pdfIn PDF document text
- https://alexandrapanayotou.com/web/images/static/file/80926317849.pdfIn PDF document text
- http://malagi.pl/user-files/fck/file/33659897536.pdfIn PDF document text
- https://agatanorek.com/files/file/79803193797.pdfIn PDF document text
- http://natproperty.com/userfiles/files/71988048174.pdfIn PDF document text
- https://haps.company/wp-content/plugins/super-forms/uploads/php/files/h1qbsbk9h5dp77fiegggvfmna4/vizotaxoxunegos.pdfIn PDF document text
- http://chia4kids.ru/ckfinder/userfiles/files/49592113720.pdfIn PDF document text
- https://acrgroup.nl/userfiles/file/kevozoj.pdfIn PDF document text
- http://ylphs.com/ckfinder/userfiles/files/zilomu.pdfIn PDF document text
- https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cec16991c0---gulageluli.pdfIn PDF document text
- https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/hi4d0qc79sokcbdbhnkonabum3/reverazozokoduzofipuref.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912b09e1b82---60027804831.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107375ed0968---boripubikulabun.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_off0000ce99.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE99	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e6ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6AB	16540 bytes
SHA-256: `40e8ff6aabd2a1edad306b10ed640bdc731c9e4f55dfbe0c96f18a61745ec38b`
`font_02_sfnt_off0001117d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1117D	11108 bytes
SHA-256: `d8fbc208b7ebabf5119ba9982e1dbfd9dd20334896b3f4a5ad2ed4dd31edec84`

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