PDF malware analysis — malicious · 0d547b7cde50f3b2

MALICIOUS

PDF

95.0 KB Created: 2021-07-18 02:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 6f1411acec79332afa95f81f5a78c100 SHA-1: 1c640d9fb4ed8935720c376d17d193b26ed057e0 SHA-256: 0d547b7cde50f3b2c19b7fca7c089d0b1d39d7297d68726ee0d344ae6370b0ad

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various domains, many of which are identified as link farms on disposable or potentially compromised hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URI heuristics and link farm indicators supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9820

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://langeline.com/ckeditor/upload/files/83650718574.pdf In PDF document text
- https://shoppingplanet.ro/ckfinder/userfiles/files/19892765762.pdfIn PDF document text
- http://billedbutikken.dk/articlefiles/file/48116139122.pdfIn PDF document text
- http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e08bc87835c---wozamuzepadetuxupuputar.pdfIn PDF document text
- http://polimak.pl/userfiles/file/17345252257.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cdb8ca13e---7700346303.pdfIn PDF document text
- http://self119.net/upload/userfiles/2021/07/files/210709093424.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/83859263d46370b89da5222232d4bcb3/zemusidovesutativovowena.pdfIn PDF document text
- https://michelbarbot.com/upload/files/tugilurafudisuxevut.pdfIn PDF document text
- http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812681da8ac---93751805163.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j0c3ekolupahu429q0fnupj5b3/moliza.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ea8ded2ccf3881bf4def3ea0c7d34c9e/zugevebavifala.pdfIn PDF document text
- http://3bbb.fr/ckeditor/upload/files/toxupudamosafokenajudata.pdfIn PDF document text
- http://ekbdrive.ru/ckfinder/userfiles/files/rokulorofidateted.pdfIn PDF document text
- http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10669887854.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ebac20287---58925000550.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c5b826afe---25429433318.pdfIn PDF document text
- http://amadpich.com/userfiles/file/43703599034.pdfIn PDF document text
- http://anhuicrew.com/upload_fck/file/2021-5-3/20210503072513499131.pdfIn PDF document text
- https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/deef6eb341898364ee650d84c07c7a15/31835103665.pdfIn PDF document text
- http://yuha.be/_files/file/niwuzavepuderibe.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/1p7r5mpoqg4p74l54ekkff4t2u/fokekoka.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b85c4bcc19---kajexiwofaragulukefonebib.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/75201810806.pdfIn PDF document text
- https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/c0a9b9715ce5931fda32296fb6f7ba42/jubokureju.pdfIn PDF document text
- http://usmleworkout.com/files/file/sulafafi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=conclusion+for+solubility+experimentPDF 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_off00010d61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D61	18388 bytes
SHA-256: `455271453367c770f19fdda59c2144178e66e3f86479b100766c5e848dd6a39a`
`font_01_sfnt_off00013d03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D03	10964 bytes
SHA-256: `df243b270ae04223339d8f79b16e43fad98279c62c880b919846aa0b22b8cd58`
`font_02_sfnt_off00015655.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15655	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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