PDF malware analysis — malicious · 787d4b36d8f688be

MALICIOUS

PDF

87.5 KB Created: 2021-08-12 06:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 9b962b381ed9eeaec4b45900af89c964 SHA-1: 7ddfa4c819bb6a13fd670887c3a4676a8c7cee03 SHA-256: 787d4b36d8f688befe1e29bb70d96d23baf4043edcd521720d134a5ef6bebe3a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URI indicators and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/uplcv?utm_term=attunity+enterprise+manager PDF link annotation
- https://capitalsyndic.com/userfiles/file/65114523993.pdfIn PDF document text
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc35c0d6f---7631559555.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/d8k35tc8n8a72nt0c7i3lircv6/70720506826.pdfIn PDF document text
- http://metabolit-plus.ru/files/file/jameduvire.pdfIn PDF document text
- https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/438fdf4c57a37609160a12ff05469beb/56597693630.pdfIn PDF document text
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607db80a616de---28344096654.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeba6509e6---zawaxodupex.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/4bi8td8fum0iv4obgh5msdk3u1/goviri.pdfIn PDF document text
- http://www.mbk-montage.nl/ckfinder/userfiles/files/703680339.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/0e106b93b119997acb5d90e17c90fb01/7459164603.pdfIn PDF document text
- http://redeyeldn.com/userfiles/file/sumejofotapivuwu.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ae65a856e---43153513425.pdfIn PDF document text
- http://computer-rudolstadt.de/upload/file/5481054519.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa314c9791d---20146206218.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca4415f598---fofitopiposu.pdfIn PDF document text
- https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/0ca6a341b6c5f77a7bbc98ab1ab2ffaa/milafoso.pdfIn PDF document text
- http://geraldinekilkelly.ie/lepudixaf.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/afce301c7deb3a60709fe0a250ca85d7/sunarawunasidedaju.pdfIn PDF document text
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/48298dadbad21dd7620f4fb9f1be96a1/94898433656.pdfIn PDF document text
- http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906be94ea1f---wujonodugizekuxuvuleg.pdfIn PDF document text
- https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/o5fitsu8j8apcgevbh9k1a8vi0/39773659145.pdfIn PDF document text
- http://drapikowski.pl/uploaded/fck_files/file/39158095620.pdfIn PDF document text
- https://wipaphun.com/UserFiles/File/97766490289.pdfIn PDF document text
- https://duel.pl/userfiles/file/lilexigowimuv.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_off0000e440.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE440	23324 bytes
SHA-256: `04eed7085ec6117b0598c2ef20bf28012682985f38b689c55afa19247d22c9cb`
`font_01_sfnt_off00011d80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D80	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013597.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13597	10624 bytes
SHA-256: `a70f46b1ab61299bb32d186982705edca6b13f3cfbfaede764fc51fc5712aca7`

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