PDF malware analysis — malicious · ca5226eb70f1e93c

MALICIOUS

PDF

86.5 KB Created: 2021-06-28 04:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 0858912cdd448737a2b5e5a9ada1586b SHA-1: 5cd3e05578f2a14e050c14e4699bf69c1ef6d238 SHA-256: ca5226eb70f1e93cc2f87037c4cb05603c5288e5a6fc2a3215276c70ad364473

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. No scripts were extracted, but the presence of multiple external URIs and the 'link farm' heuristic strongly indicate a malicious intent to redirect users.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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 http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9028847cd---jexigovoxozoja.pdf In PDF document text
- http://scales-center.com/shop/fck_file/file/21767642964.pdfIn PDF document text
- http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/2ee5e621d0a9b55b6ecf70755738eae5/bipurumu.pdfIn PDF document text
- https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/1ceab978016e79574853c33f0ccdb2e1/73400704471.pdfIn PDF document text
- https://oklogistic.lv/upload/file/wizarokaxusomokibazife.pdfIn PDF document text
- http://doo-san.com/userfiles/file/20210511071113.pdfIn PDF document text
- http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/f0319ac2a88fc3bd8740b66ef59fb1b6/82055885794.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f212bdd66c---nesurijulukak.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9d483034f.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084cc2ea81f3---4725335312.pdfIn PDF document text
- https://coastalstudio.com/images/main/file/valivomuxodez.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/bd466g4rcmcd9rhmptqhde7ea3/21620324849.pdfIn PDF document text
- http://ankamet.com/userfiles/file/81538363021.pdfIn PDF document text
- https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/5e5cdddc0c777e353cc3f2971ad768f0/fudasasumipasi.pdfIn PDF document text
- https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/e98n2038u3u4263oqu4kdfujgn/pemipit.pdfIn PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9aaa4db9fa---4799645926.pdfIn PDF document text
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088831e15fd5---18167853524.pdfIn PDF document text
- https://bnovum.hu/downloads/jazufizekoparuwew.pdfIn PDF document text
- https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16099908e8baed---gamanomukujipolimitam.pdfIn PDF document text
- https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/ghmi64p385et17olhcppmejoo4/zinagorajenosidor.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92fbb69fcc---dubaroketateniwud.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609962be875cb---75724477668.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/lc3qvfssj1l43t000tjoeie54v/tezuzetonexuvavuwuseje.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=working+out+angles+of+a+trianglePDF 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_off0000ed95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED95	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000105ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105AC	10576 bytes
SHA-256: `d9953ff7edd7f4d1cf297da1dfa8a27dd80cd464b5ddc1d093aeef56cb19d98b`
`font_02_sfnt_off00011dfd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DFD	17780 bytes
SHA-256: `a05b62855d7dbcf36a693448cb2cd144bfe26f5e9bed775e76c590e724d564c4`

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