Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be14f5ddf0ecab7…

MALICIOUS

PDF

93.4 KB Created: 2021-09-01 16:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 85ec220abcdb3175070bb30f306fb053 SHA-1: 7863f685d78419cb6e6ccc080e73a768a77529e7 SHA-256: 5be14f5ddf0ecab76c309ed94b95503df54da33b7b82b8418f57ee2122ac9db7
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pixomot.ru/uplcv?utm_term=how+much+is+1+cup+of+water+in+oz PDF link annotation
    • http://hotelamadeustorino.com/userfiles/files/96140653415.pdfIn PDF document text
    • http://ranagro.com/files/kofejininimirolapesakaje.pdfIn PDF document text
    • https://flying-vikings.net/UserFiles/file/79618581295.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d88ee2f93---xovebipoxedu.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/ba1f03e34f9f8943383a44a4e7790e7c/36683781311.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd3dc90c0---23497366339.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e82419b2c---2655557757.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/jedemo.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/160795d25cab8a---83410913313.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/40903696590.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/56194208836.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/33963018729.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c14b442e03f---vopitup.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/68582226310.pdfIn PDF document text
    • http://wdnederland.nl/file/sopokakuzub.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/silepoxirijinus.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/lexaxotinuvo.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d99933471---pelufafobogesazezato.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612765137cc6c---valikun.pdfIn PDF document text
    • https://murtenhof.ch/userfiles/files/82269595971.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/gomerazemegesowan.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/6cf1330e49440934cf753bb58b9cd647/68914899414.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/47589665331.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/b3b3451a0b1138ad5e5110fda1d5f80d/faraloxajapagesetiwonevi.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_off00010804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10804 17832 bytes
SHA-256: 4894e323af4df8107c3d07de6687770a41ce093335fc605ab400d3cf78310d11
font_01_sfnt_off00013677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13677 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8E 10988 bytes
SHA-256: 714997e7c45b6609278b8e6bd0e88f6d25d06a95bac7d45364d0f14a81e5bd7b