Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05b314ce004d5fe…

MALICIOUS

PDF

86.4 KB Created: 2021-08-21 14:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8d4b0c3e36ede8640ab20e96a30a27e4 SHA-1: 8ccbc6637ebba9f3c8ce61b0af1a3a4651864f68 SHA-256: e05b314ce004d5fea0dee31d2bbdb115d1e66e2d8aa6d60c4c2e010c1b817364
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://drafthe.ru/uplcv?utm_term=warhammer+40k+8th+edition+rules+errata PDF link annotation
    • https://helicopterleasingservices.com/userfiles/files/4713184911.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/luxapapurosiga.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/65220139941.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/6c376f184691b77d83a6d58bdb9ebc96/48191044093.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886108b7433---2594426251.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/53239137688.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/zumivudagakojumaxisetu.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160782004b7110---selugeva.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c916a695a18---92416401641.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/36653186706.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/towixas.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/2f80ab153506f8996b70771e57e76e56/88304959472.pdfIn PDF document text
    • http://blackwingsexpress.com/upload/userfiles/files/81206899262.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/ditifigajot.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/56453563884.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48612a5918---gotodunulewafotepamuvo.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f98af9bb79c---5661136375.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe6365d561---nudukefugevefav.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7142d45d4d---94332910580.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae92e71c1e---juzire.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/93071135323.pdfIn PDF document text
    • http://sakurahoaanhdao.com/webroot/img/files/wasuxetexonerog.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/67164470662.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/wenufagefakubinewafil.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/74027941527.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/buxewajurotigom.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/81483233895.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_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 11108 bytes
SHA-256: 8c670d8ab6109782afb19d4e6a51f9bd2535f3cd64ec5bf0f311860abe615ae7
font_01_sfnt_off0001047d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047D 17748 bytes
SHA-256: e469e88972c562df4074a6eaeb9d279804af9d66023dc6ac4e6d0e8dccd06f9e
font_02_sfnt_off000132b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1