Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d600b9500e49f7…

MALICIOUS

PDF

84.6 KB Created: 2021-09-03 22:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b305bff4f3ab87702a4f47dad04bcb86 SHA-1: 3db4570ae4d31c7750b0680f72fe0f1bb1bc082a SHA-256: f7d600b9500e49f7ee7fb2da3b19b1bddbe4c97cad5677552f3245fa8b9a8aa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://smidgel.ru/uplcv?utm_term=garmin+marine+gps+owner%27s+manual PDF link annotation
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/52c2558f14024dc3c0093c1c2297cf17/sisedamuvove.pdfIn PDF document text
    • http://lblussana.it/images/file/37436841533.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610f223600a72---58763085144.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/70120505451.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/71636068082.pdfIn PDF document text
    • http://panteres.com/files/files/fipokido.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/73394486975.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a5082863---gidiluba.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/7klkg98n9k0vsokqa0l0eqqrca/zadijidesejida.pdfIn PDF document text
    • http://wenxuezj.com/images/File/gibufavufaruzuwu.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3646af593---vegixa.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0cb2228b1---98978910903.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/53923891739.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613049b9aee40---43656403153.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/48114290615.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7723062129.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e16a78906---67840414721.pdfIn PDF document text
    • http://3sdent.com/upload/files/lepowaxo.pdfIn PDF document text
    • https://go2germany.ru/files/file/76531522644.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/a4a2c9d5d64861d27c9f37477b35fa47/figokutumekamuru.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/m1fin020sdj28f0s6d8mrrpq4s/vugizelowakujoneriwo.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/nuvagijedoved.pdfIn PDF document text
    • http://mezon.jp/userfiles/file/garevanemawamigawawawu.pdfIn PDF document text
    • http://irodori.kir.jp/files/file/dujedifupine.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_off0000e439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 10756 bytes
SHA-256: e0e659435c817b826f889bfa382be83d192b683819cfd833edc67353606126b2
font_01_sfnt_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001151b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151B 18036 bytes
SHA-256: 142caaca153ea3e2945fc2a8ece256be35a365fde524d7dab58a9e7f23f58ca3

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