PDF malware analysis — malicious · 9fe263f9926b7620

MALICIOUS

PDF

70.4 KB Created: 2021-09-09 12:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 52f19c70a2641da262a4b4536eb79e44 SHA-1: 9192cbd870e75fb8220b6e42126b699e90117684 SHA-256: 9fe263f9926b7620d10abe892725c016005fdefb7ca310308ef53af105ec70f6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing PDF. It contains numerous external URIs and link farm patterns, suggesting an intent to redirect users to potentially malicious websites. The PDF structure and embedded content indicate it's part of a campaign to distribute malware or conduct phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9909

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://pixomot.ru/uplcv?utm_term=green+screen+apk PDF link annotation
- https://tebra.si/userfiles/file/kibejubakifukobubigeseva.pdfIn PDF document text
- http://everest-c.ru/ckfinder/userfiles/files/97334570860.pdfIn PDF document text
- https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/dexivedibemumopujagoguj.pdfIn PDF document text
- https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613790743eebf---dalisopawisiti.pdfIn PDF document text
- https://perfecthospital.net/ckfinder/userfiles/files/23759868963.pdfIn PDF document text
- http://swatimishra.in/uploaded_files/userfiles/files/64215951748.pdfIn PDF document text
- http://filtrydokoparek.pl/img/all/42803201833.pdfIn PDF document text
- http://kronikarp.pl/ckfinder/userfiles/files/62344252462.pdfIn PDF document text
- https://sunridgecorp.com/uploads/files/202109052250465122.pdfIn PDF document text
- https://catequesisnavarra.org/guiarte_userfiles/files/8029526674.pdfIn PDF document text
- http://burelomdo.com/ckfinder/userfiles/files/88034856115.pdfIn PDF document text
- http://drzwiukryte.pl/userfiles/file/25499982580.pdfIn PDF document text
- http://zzzwchem.com/upload/files/24259436386.pdfIn PDF document text
- https://huuphongplastic.vn/uploads/images/files/37590851261.pdfIn PDF document text
- http://avvocato-callegaro.it/public/file/waboginisuvowadubum.pdfIn PDF document text
- http://erictex.com/ufiles/files/63084334935.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613642f8cfdcb---53090808020.pdfIn PDF document text
- http://deaprogettazioni.it/userfiles/files/vopufovudekibilusizopez.pdfIn PDF document text
- https://alansglobalservices.com/ckfinder/userfiles/files/golesovadogodekaw.pdfIn PDF document text
- https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/a91fd96b550839ae4c7befa849e36b5e/68740086119.pdfIn PDF document text
- https://biocoop.legreniervert.fr/ckfinder/userfiles/files/nebofevofawupow.pdfIn PDF document text
- http://yuanhebiotech.com/upload/files/29162751825.pdfIn PDF document text
- https://galerieportelouise.be/userfiles/files/xixuze.pdfIn PDF document text
- https://taechoclub.com/FileData/ckfinder/files/20210902_6E7E0D0AC53C92A5.pdfIn PDF document text
- https://thegioibaobicarton.com/Images_upload/files/17453295687.pdfIn PDF document text
- http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tuzojozunupelek.pdfIn PDF document text
- http://skiflogistics.ru/userfiles/file/diwakig.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_off0000b80a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB80A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d021.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD021	10140 bytes
SHA-256: `8e51f69279e9ac93803a9f0e1b99a016318fdb3ac143699d62ac2a7e6b6f4c6d`
`font_02_sfnt_off0000e6ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6EE	14748 bytes
SHA-256: `8734da47fa0d9d21d6e58711340f319b3ae3dc5a1055ce16a5d635fb2ef78e13`

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