PDF malware analysis — malicious · c121b777558ca64e

MALICIOUS

PDF

86.3 KB Created: 2021-08-10 21:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: b2de4a08f0900d97f9d8084274be6d76 SHA-1: 003d2dcff2576fd514b69298515f04283c59de19 SHA-256: c121b777558ca64ed50028dc32a54ef8525bb88b006d24f817547416a4fa1b5a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the presence of external links and the overall heuristic profile points to a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://irlanc.ru/uplcv?utm_term=income+tax+computation+format+pdf+ay+2021-22 PDF link annotation
- http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/2060915174.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f9874bf9f---xotexijawexe.pdfIn PDF document text
- http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16099fe8481a4c---7550860436.pdfIn PDF document text
- http://studiopedrazzini.eu/userfiles/files/54948976434.pdfIn PDF document text
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c67ef2ad93---luwelesusofetazup.pdfIn PDF document text
- https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a162eff1a76---piniguxejavinabu.pdfIn PDF document text
- http://vinczeandlaszlo.com/upload/vazogiwafopexawodid.pdfIn PDF document text
- https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/50786f2c8cc96bb891cd4cbf06068313/86238942134.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608553cfedb4e---nebadezojesujutibe.pdfIn PDF document text
- https://villanakarin.com/userfiles/files/21389502258.pdfIn PDF document text
- http://am-assets.com/aom/magnolia/userfiles/file/diviluvarawebi.pdfIn PDF document text
- http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/57520677413.pdfIn PDF document text
- https://ferado.vn/userfiles/file/95072220348.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/538294e6d43f5fea48ad479d808ee2fa/76864512521.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca76f4cf8cb---movonomoguwetedadim.pdfIn PDF document text
- https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/560884c798471c7038e198b5891545e2/lutugazudotujo.pdfIn PDF document text
- https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6c961a15ef42c6573798c325f5467d6/61973453247.pdfIn PDF document text
- http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/0k8keugmhtthh65h7g183rjin5/fititusetosiwajef.pdfIn PDF document text
- https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/62f4qjpqilr7b33le570mirn8r/87837946849.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ad83ef263aa215eadabfc5596ad7eb93/48968637418.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/83f29038afa127c398c5d9ec714535a1/1483477452.pdfIn PDF document text
- http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/36137138963.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8e54951ae---kemukapetumavopixok.pdfIn PDF document text
- https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/6a6f6e58d162673c4ac02013243344f2/16781070942.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_off0000ebd0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBD0	11164 bytes
SHA-256: `db42681e5677d2db2471a735a5a96d11fcf36de5acd0248cc13fa742d41797fc`
`font_01_sfnt_off00010605.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10605	17304 bytes
SHA-256: `2dc4ad969adeab1cbd52a083027d01a5cab30e27c7e38272a39b510d50e46f83`
`font_02_sfnt_off00013350.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13350	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.