PDF malware analysis — malicious · 7550640eb4dd0b9a

MALICIOUS

PDF

85.3 KB Created: 2021-07-29 23:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 2272ea76b97f3b9e57d11dac760700ce SHA-1: 22e4cf97ba1056dafba025fa1cded5f34cfe80b0 SHA-256: 7550640eb4dd0b9a3f017eafc49833b18f229e9bcbfe65e98c55c5539b6eee85

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of numerous unknown URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support the conclusion that this document is part of a campaign to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcd6ad6377---25744578473.pdf In PDF document text
- http://sibinetweek.ru/userfiles/file/2321722138.pdfIn PDF document text
- http://aranykoronakft.hu/userfiles/file/95216081754.pdfIn PDF document text
- http://learnazia.com/fck/imagesfile/vepukivube.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8ab2f368aee2579fec2dfd7f946871ea/dimeke.pdfIn PDF document text
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b31a2042dda---64575734797.pdfIn PDF document text
- http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4f3257b38---xukinuke.pdfIn PDF document text
- http://travelport.pl/userfiles//file/84393739731.pdfIn PDF document text
- https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/f678hb67q1apou84tcj7m78mv0/96403496252.pdfIn PDF document text
- http://bfr-bialapodlaska.pl/userfiles/file/xegor.pdfIn PDF document text
- http://frezerovka.by/images/fxeditor/file/latizokefusiwudopizeluzik.pdfIn PDF document text
- http://tdvvietnam.vn/webroot/img/files/jopaxowokulilopividanan.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91493bd0c9---vumobanokolejufevaxos.pdfIn PDF document text
- https://jamuiboe.com/webroot/upload_media/58950850973.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085cabae0c48---farutu.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/e5250bd929b734d59ffa021674e8e04b/ravurijipufexusuxut.pdfIn PDF document text
- https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/dbf67b193e4c7fd0a3264f2981f696d5/63784239000.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9c996885a5016f23f4a7fa96b4e95181/samuj.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b684a2f5e---16853150215.pdfIn PDF document text
- https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e91f56116a2---7524607284.pdfIn PDF document text
- https://beautydiction.com/ckfinder/userfiles/files/bogelobejiledebikuwupume.pdfIn PDF document text
- https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/407579c98c3185ba3c6f5212876062a5/wetimumepitixuxujiwa.pdfIn PDF document text
- http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/ditototamevopozew.pdfIn PDF document text
- http://dolphinegypt.net/userfiles/file/bedamedodejodupag.pdfIn PDF document text
- https://amitadevnani.com/userfiles/file/9758397669.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+get+a+mod+menu+for+cod+mobilePDF 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_off0000e703.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE703	17508 bytes
SHA-256: `2b7e298c10391d300e06ff4b14ba324b2063b0ba834c817bc23098bb53ee46e6`
`font_01_sfnt_off0001152a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1152A	10968 bytes
SHA-256: `47df799eef655646b1cc31876ae3c58dcca151a305e66626123d2e2dde37734f`
`font_02_sfnt_off00012e66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E66	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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