PDF malware analysis — malicious · 85d3c0314b7d0627

MALICIOUS

PDF

75.3 KB Created: 2021-07-29 17:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: edd7c788b1c0ec0c329a81ed00c9f250 SHA-1: 7309bcc82663f2a4fa4ea94a5e3fc5a6a868da1a SHA-256: 85d3c0314b7d0627e307709662bbd09410673522a6339dd746d5568e827cb278

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains numerous external URIs and link farms pointing to potentially compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution lure. The document body is unreadable, but the heuristics indicate a malicious intent to redirect users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://queure.ru/uplcv?utm_term=libro+ingenieria+economica+6ta+edicion+blank+%26+tarquin+en+espa%C3%B1ol+pdf PDF link annotation
- http://highendschmiede.de/highendfiles/file/wolizepamamilovorinu.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/kk4rjr6ula34i914bevk9mrk30/41592497825.pdfIn PDF document text
- http://stressmanagement-karriere.de/userfiles/file/8389818472.pdfIn PDF document text
- http://amajyuku.com/files/files/godowopetorujunojiwala.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8a46a45ed3---xotigutararapepininutubo.pdfIn PDF document text
- http://smartwealthhk.com/userfiles/55533129224.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/423b72372da2e47a58b1bebc443c1980/gigeto.pdfIn PDF document text
- http://christmaslandint.com/userfiles/90196947444.pdfIn PDF document text
- https://coluer.ir/documents/file/fekuwuvonow.pdfIn PDF document text
- http://derma-dts.de/files/file/lufuxikis.pdfIn PDF document text
- http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607992da1cca7---pukaso.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160da82572fc72---vafazunojajejuritaw.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/tesav.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/bb63s9q3h7fq35scuqmt3gi9lp/nojodilozumilimorodaxote.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/a455ddd716e0eeb8be05f224efca5ea0/94790878035.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/67b9d21a5c25ad9d3471bb9664dfbc2c/22947442021.pdfIn PDF document text
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/27945910a8725bc6b2147ee0e96f68bf/3153087266.pdfIn PDF document text
- https://lapalettedesarts.fr/gestion/file/47883022716.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/159bae9fe2942439d19bfde923530c08/lejifelesuxurupekovew.pdfIn PDF document text
- http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/9e167f3d757d861f80448a8b73223633/26383801698.pdfIn PDF document text
- http://viprealestatebrokers.com/userfiles/files/tasuxumuteviroveki.pdfIn PDF document text
- http://tycoonmedical.com/userfiles/file/daresidasoruxaleri.pdfIn PDF document text
- https://sanipacific.com/attachment/file/pumutaxomileb.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090cdcd9ecd1---56658543987.pdfIn PDF document text
- http://cartopack.com/Images/file/xafusavadu.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_off0000c1cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC1CB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d9e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9E2	10904 bytes
SHA-256: `92451d7c55502539a0cdd71772cc4271ce699608f6218c3665e7b0007803b073`
`font_02_sfnt_off0000f2dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2DD	16872 bytes
SHA-256: `9f933c72651d6b7a868aa4133d68690c6225b635b4d87b8d479ab4458b35ec75`

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