PDF malware analysis — malicious · 9fceea7bbd852fbb

MALICIOUS

PDF

80.7 KB Created: 2021-09-01 15:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: ca287e5be73e7eaccde055c7aa573448 SHA-1: 819e19069ea5231c35d9ebe94366896120560b08 SHA-256: 9fceea7bbd852fbb0ef8d7314431e278d0020e56a6399d2c024e217bc35a1e8e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised CMS upload directories and disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The PDF's structure and embedded URLs indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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 https://ketchas.ru/uplcv?utm_term=farmers+of+forty+centuries+pdf PDF link annotation
- https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/508a66e3d168cdc65dfb836e615652f3/13321331980.pdfIn PDF document text
- https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b235093cff3---47259174354.pdfIn PDF document text
- http://sowa-architekci.pl/userfiles/files/ranagobavivarunilo.pdfIn PDF document text
- https://autoandtruckrepair.net/nbloom/fckuploads/file/sabinuve.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/bh70lj5i64h9jna3pkpmu66ou5/25356269749.pdfIn PDF document text
- https://coimbatorepressclub.com/FCKeditor/userfiles/file/pagavawelototijunixagewu.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e6d1864dba4---27524901837.pdfIn PDF document text
- http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a39145b0e37---nejirafavojilik.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add1f4adf8f---74986684150.pdfIn PDF document text
- https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/df84470e9d92364144b80aeccaaf9912/38213045960.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a28caa5f125---11455679600.pdfIn PDF document text
- https://stayinbranson.com/ckfinder/triplebuserfiles/file/62166009724.pdfIn PDF document text
- http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/sajan.pdfIn PDF document text
- http://cn-polylysine.com/d/files/3882012445.pdfIn PDF document text
- http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/6302cb1292f8bb54bbed11ea039a97c5/gupurev.pdfIn PDF document text
- https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/q1e7ucocln29qb1u5offb315ib/77735773819.pdfIn PDF document text
- https://vokalensemble-vocembalo.ch/userfiles/file/fupojasubekiraremuf.pdfIn PDF document text
- http://www.siposferenc.hu/html/zokukotujaronuzevox.pdfIn PDF document text
- http://tetraeng.it/userfiles/files/mezagosovobuseto.pdfIn PDF document text
- http://renovator.cz/files/file/wenovux.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16128df4810a4d---17427683183.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac885186bbe---tizojela.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/35c30b14d0bbae49f613f4fe07bbf654/66463776358.pdfIn PDF document text
- https://tatsolarlight.com/uploads/files/jafuxafi.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094d4107a832---94903874935.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
`stream_006_off0000ed74.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xED74	10928 bytes
SHA-256: `69e5e6484a42d8c0d75dd69ca7c5bf5258d8f65255945fa3a556da245670d50f`
`font_00_sfnt_off0000d55d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD55D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000106c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106C5	17552 bytes
SHA-256: `ef1ae3b99d3f84a531cadcbc9b361e42382aa4b7a234d09ca1cd0092e82de923`

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