PDF malware analysis — malicious · 0fbe0defe0a59248

MALICIOUS

PDF

87.5 KB Created: 2021-09-06 05:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7f1b7b16a6c52ee8a19e85c0f65dab4f SHA-1: c2f5c52b705eb55e75e5a290a5ff74c3e854ecf4 SHA-256: 0fbe0defe0a59248546b9165196c3d7140d0a6e9ebe41e6ad3693a6f8f71ac4e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://synerhu.ru/uplcv?utm_term=active+listening+1+teacher+manual+pdf PDF link annotation
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e86d8a8ce34---lebawububixufiremi.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b459830746a---timiledujemivopixet.pdfIn PDF document text
- http://uralinteh.com/uploads/files/5305375480.pdfIn PDF document text
- https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a4340c786c3a132a717ca8894efc16f8/85667885976.pdfIn PDF document text
- https://mayersoffice.com/userfiles/file/52517689049.pdfIn PDF document text
- http://chekeeh.ir/basefile/chekeehir/files/ditupuzilikek.pdfIn PDF document text
- http://vivaldiskibus.com/FileData/ckfinder/files/20210811_D57F3F9EB4DBBD8E.pdfIn PDF document text
- http://changju-hotel.com/CKEdit/upload/files/9443919137.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0219a4f07eb0fac29faebc0672693f98/76418395833.pdfIn PDF document text
- http://entone.es/wp-content/plugins/super-forms/uploads/php/files/08a9068f4432f37a4f478841be96f0c0/potunetosopegibod.pdfIn PDF document text
- http://novichiha.ru/pic/file/64453616892.pdfIn PDF document text
- http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7805e930f---bozuwunugotowuzegujusu.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/hi2aj0oemuuv0kjan0g49l5hqn/31040611454.pdfIn PDF document text
- https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4f827ba911---76384445046.pdfIn PDF document text
- http://tafgambiatours.com/userfiles/file/28769640307.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b77ce02d001---15383003940.pdfIn PDF document text
- http://salsainkonstanz.de/media/files/2758086657.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/161214e1606b68---95418852967.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16102ef93aa957---22815121141.pdfIn PDF document text
- http://abwingsbuffalo.com/uploads/files/14297684834.pdfIn PDF document text
- https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/acc6f2066b5e33aea29542c99391f279/24545242179.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f133a3c5dc5---33569323962.pdfIn PDF document text
- http://chobacgiang.net/webroot/img/files/lulevujafe.pdfIn PDF document text
- https://thegioidongphuc.net/ckfinder/userfiles/files/turupumejebo.pdfIn PDF document text
- https://rakowka.pl/userfiles/file/retavuxevimipu.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_off0000e839.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE839	11144 bytes
SHA-256: `87a912c18193f2da147810d7f1c1d04fc57475182ce21c3130764c02716f39d3`
`font_01_sfnt_off000101fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101FB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011a0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A0D	19708 bytes
SHA-256: `8367636d3dc4b88bfbccf43a02cb40935b779d2365bedc02a4d3b0dad2c0234a`

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