PDF malware analysis — malicious · d7f48895040bc24b

MALICIOUS

PDF

93.1 KB Created: 2021-07-21 17:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 36eb15ab7ff3c482a950b408e29b7657 SHA-1: 795ef0a9353fc6ad91cac00026e6f9e04b23c9d6 SHA-256: d7f48895040bc24bf6ff41a08d8db61373c8d302a058e1e07d81916d0536fda2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites that host further PDF files. The presence of numerous links on disposable hosting and compromised CMS uploads suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9932

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.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffa5a3c852---razelapotun.pdf In PDF document text
- https://bangprice.combangprice.com/beta/cms_image/file/7282809879.pdfIn PDF document text
- https://gwynharmon.com/home/gwyn/public_html/ckfinder/userfiles/files/11513334821.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43bfc26e1d---dawuziloti.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1608335624e2fe---22437758299.pdfIn PDF document text
- https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/o2lik0lbdqvbp7aeov16noke37/muxifunapop.pdfIn PDF document text
- http://www.asap-recruitment.net/upload/file/fidopupebak.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160975d7f4d1b2---dedigutokeriguzujofag.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d690046b70---98984445088.pdfIn PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608de81e6c235---deseranadokav.pdfIn PDF document text
- http://myappartement.de/web/editor/files/73938093096.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/14979f45cae84b77c5446e0386622f3b/jexidujitadotulu.pdfIn PDF document text
- http://hitecds.com/userfiles/file/gizedub.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14bea67498---52805126452.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/71752fcd9480859c2c6b62239722163f/fiwizavivimibumu.pdfIn PDF document text
- http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/f6204f51b6cd4caa11702be617c1bf6a/fosapaviwufofarumomibi.pdfIn PDF document text
- http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160acd60cbdcee---9056960975.pdfIn PDF document text
- http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774e00e7c0a---7490434385.pdfIn PDF document text
- http://55pluscommunityspecialist.com/userfiles/files/13867095290.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa24c39b672---fubevamuzibusawulabeno.pdfIn PDF document text
- https://hagakure.by/upload/editor/files/nejeruwixuler.pdfIn PDF document text
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/40f6cf37137ef479f1317276a126d491/zurovadeketopiwinofebex.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6b92a3e97e---saxivikixuzisuxase.pdfIn PDF document text
- https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16072b8a4e1fdb---fogukizepawaxitupufef.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/1462e9577af36ce23a22f2cdb0f6bcf5/mawowosutaduvoso.pdfIn PDF document text
- https://actorconseil.com/files/file/77819730431.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=sig+p320+with+manual+safetyPDF 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_off00010223.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10223	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011a35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A35	18468 bytes
SHA-256: `0ca5e20a2273a068089269f2051e5d05a2e0ecd8bd11125f1843b3e730220fed`
`font_02_sfnt_off00014b20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14B20	11372 bytes
SHA-256: `7720f2f43b2584fbb2950ce7f756fd03cb5a0c05d5adaa8ac8e061f872d9ed90`

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