Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe2d18a04c7799b…

MALICIOUS

PDF

79.4 KB Created: 2021-09-18 00:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 348daeb0cfd4076412c60868b16fc5de SHA-1: 1510923d3ec5c2be26de5c7bbbe2302d166f7707 SHA-256: 8fe2d18a04c7799b665c9620e58a7ee103d3ba3985942e39068a06d195969485
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and link farms pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The file's structure and the presence of multiple external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pistant.ru/uplcv?utm_term=high+quality+game PDF link annotation
    • https://full-flavors.com/img/Data/file/winamogavamoxodep.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161309b55789a0---9553087045.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/darifewowago.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/bematakomuzatarodin.pdfIn PDF document text
    • https://ms01bet.net/contents/files/xaguvagapus.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/84i4d9lh1sb0imdi05a0rr6969/79185006095.pdfIn PDF document text
    • http://maihome.hu/admin1/file/1203016976.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/segimifinaxevefotilagepu.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/14719342474.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/jekisilelanurujevo.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/dunoviwip.pdfIn PDF document text
    • http://cursosadistanciayonline.com/medios/files/99308251990.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/66166076766.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/xokavodojijosuwobaboz.pdfIn PDF document text
    • http://ned.ru/uploads/files/64425218265.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/97463564711.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/33446742748.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/5q10gs8ditusfgo2s1jv3qnpia/fivifuz.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/29820447516.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/zititesefa.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/18353348140.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/wuwegur.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_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 16452 bytes
SHA-256: 3903fc9aa26c32ab7541dd9d1c8102cb7d0dde12916ad9e58f0b0275775d7f63
font_02_sfnt_off0001191f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191F 10416 bytes
SHA-256: 413478504062b3a3b50dee16d5d0c6d128831f8b88e212f0ab0ea230fa2aa0d4