Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c84536d7e1c96c…

MALICIOUS

PDF

78.7 KB Created: 2021-09-21 06:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f6e11d656a0fb424a8379019e2eb774a SHA-1: f4060923c45328df04ba151549126b6526d09935 SHA-256: f6c84536d7e1c96cbbdf48178d00bb86a34914d2dac190208cdee0c55b48c7fd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=dragonvale+mod+apk PDF link annotation
    • https://zaragozadenoche.es/upload/files/34020935296.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/55826779180.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/kivesiganulaleluku.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/derugutowokalekakamare.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/50815380313.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/40520897789.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/lerowi.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/tadegukosarelevateva.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/30933132611.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/gotuwipilanexiv.pdfIn PDF document text
    • http://vector-food.pl/userfiles/file/gisejovumu.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/28534264083.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/19750183328.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/20478387643.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/80453458899.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/60673204827.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/tomonobax.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe0f1a16d8---xitegu.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/45842033487.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/nivilogalokizejewitipir.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/dubem.pdfIn PDF document text
    • https://coil.hk/upload/files/62103117843.pdfIn PDF document text
    • http://unityproductions.com/upload/files/22948105223.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/18533553233.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.

FilenameKindSourceSize
font_00_sfnt_off0000d313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD313 10536 bytes
SHA-256: f51dc5820d289abc3f7d2fb8a22345c7b542e63efdfa36c2625b2d991f1a1094
font_01_sfnt_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E3 16628 bytes
SHA-256: d064e1c3afff999f66723a460e39db88ed71b749c0f949c4ad30e5493448ef04

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