PDF malware analysis — malicious · e7faaa7c876a2117

MALICIOUS

PDF

96.3 KB Created: 2021-09-21 00:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 3f719486b6be915d9b68114844a24938 SHA-1: c40507e2e7678007e1081a64a98baaa49dc5811d SHA-256: e7faaa7c876a21177253149a2f15903704541321090b1705c49c19ef01622a44

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful content. The PDF structure itself does not contain readable content, but the presence of embedded URLs points towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9936

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://cructi.ru/uplcv?utm_term=el+laberinto+del+fauno+streaming+vostfr PDF link annotation
- http://hidramaco.com/files/files/gevikelarevavamitanine.pdfIn PDF document text
- https://pchome.uzai.ca/upload/files/58979382288.pdfIn PDF document text
- http://grupafurman.pl/!mag2011/userfiles/file/wenodixodamizugagozebog.pdfIn PDF document text
- http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/kudusepumorabelamutote.pdfIn PDF document text
- https://adlinefor.com/home/webagen/public_html/korn/data/file/jewan.pdfIn PDF document text
- http://korvet-sp.ru/userfiles/file/77782652520.pdfIn PDF document text
- https://tlproduct.com/userfiles/file/wojokowotad.pdfIn PDF document text
- https://odlingfamily.com/userfiles/file/542628728.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/6a3ekmfkdjakk2v2t9hjms2sss/99387391203.pdfIn PDF document text
- https://ladachess.ru/userfiles/file/nunogorewudiwigetobop.pdfIn PDF document text
- http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7cddb8779---70120367202.pdfIn PDF document text
- http://optometrystaprzemysl.pl/userfiles/file/wolupifozizelozidofo.pdfIn PDF document text
- https://securitydm.rs/slicice/file/98839051848.pdfIn PDF document text
- http://boissee.fr/userfiles/file/gobinazisurafig.pdfIn PDF document text
- http://biosurfest.com/userfiles/files/95813901473.pdfIn PDF document text
- https://dalnoboy.com/data/filestorage/upload/files/dunojiz.pdfIn PDF document text
- http://frutapacargentina.com/ckfinder/userfiles/files/wovewepusat.pdfIn PDF document text
- http://cadelupo.it/userfiles/files/lixogisumokiri.pdfIn PDF document text
- https://cathita.vn/upload/files/37978991209.pdfIn PDF document text
- http://gro-felix.si/uploads/luzeteretu.pdfIn PDF document text
- https://wotfiles.com/ckfinder/userfiles/files/70535531115.pdfIn PDF document text
- https://www.leasing.net.in/ckfinder/userfiles/files/gujuloboberujunulaku.pdfIn PDF document text
- http://onthebroadway.com/CPD/adminpanel/upload/file/81506039455.pdfIn PDF document text
- http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/34811028687.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_off00010bee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BEE	10984 bytes
SHA-256: `071565c3be55f4ff9089dbc37ded9ff8b6e3913221c89ebbbc758a09af3b7d00`
`font_01_sfnt_off00012539.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12539	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013d4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D4B	20304 bytes
SHA-256: `742ae3eebcb9e840fef2f3b2e7582f3c02e1830bdff0ce9c45bddf7001a4e895`

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