PDF malware analysis — malicious · be134bec553dcb54

MALICIOUS

PDF

76.2 KB Created: 2021-06-25 13:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 85dec6ea9375045211dcdf1d7ddc6291 SHA-1: fe1347afff355926b37b2bcc308f662a130806d4 SHA-256: be134bec553dcb5480151ef5c20a2869b6068dc18d6d3660caad9184b299f6f8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised websites or disposable domains, suggesting it is used as a link farm to distribute phishing content or malware. The presence of these links and the overall structure indicate a likely attempt to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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://ketchas.ru/uplcv?utm_term=wy+state+auditor PDF link annotation
- http://techbico.vn/uploads/image/files/33709514403.pdfIn PDF document text
- http://dwhs79.com/clients/15834/File/19114263400.pdfIn PDF document text
- https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/2572a0db4ed75fa5ee705b55b8194324/notezenirajapenibeme.pdfIn PDF document text
- https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/dad075e59e2a78b9de413095e889345c/xaguxodezonididilorivuda.pdfIn PDF document text
- https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/ad591052a1a8e553d4bc59ed81958fb3/wagewazukifivawaneku.pdfIn PDF document text
- https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/79c8a657473ed5b128d546748134d0d0/74337696056.pdfIn PDF document text
- http://mdbim.pl/ubezpiecz/obrazy/file/xoluzolijuvizokesel.pdfIn PDF document text
- http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/dawewebagenirefikejonige.pdfIn PDF document text
- http://taiwanglassgroup.cn/userfiles/file/63573015393.pdfIn PDF document text
- http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/861c7132e034e8d32d76deee7ab952e0/sogefunabev.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767fb17b780---29780256088.pdfIn PDF document text
- http://hnc2.com/userfiles/file/20359939725.pdfIn PDF document text
- https://burgas-remonti.com/userfiles/file/danugaduruvi.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a505a6cdd39---19896619784.pdfIn PDF document text
- http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9902b3d273---kavaboruxonuxat.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_off0000c544.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC544	10296 bytes
SHA-256: `e93e7823b5906e9cbedba3b735a73cbf3ba9d97d7707c44d1e89ba50110c635e`
`font_01_sfnt_off0000dc9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC9D	18000 bytes
SHA-256: `e85491414d5cec75b014bd10620a8e9ce8c46d11014f3ece62b3eb220d818be6`
`font_02_sfnt_off00010c2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C2B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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