Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e969fe66ed03238…

MALICIOUS

PDF

78.5 KB Created: 2021-09-19 19:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b0e02c3b4de5f94037f9bb17c5807fe0 SHA-1: 182226cbfa92aa2173fb26b003e54c1bd751da78 SHA-256: 9e969fe66ed032383e4094cf07d6d2ea8af8965ff1b2ad09a299d50be2982e11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with multiple URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute phishing content or malware. No scripts were extracted, but the presence of numerous external links indicates a primary attack vector of directing users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/89e42bfa889029252a67fc6a00e905b0/bikilotozebuxob.pdf In PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210906092112.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/18429028867.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16137149708fd3---dulevutadepapifuz.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/faretape.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/0ca1e0996594931da80b55e8feb8adb7/39325081293.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/32845781042.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/0sv34qgm0g1dbrl53u4c1kloj1/lubomido.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/novobefuferez.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/65704363247.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-6/20210906032119665453.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/nukixiwepakadowa.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/56972259553.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/purozulajinivozadopijag.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/51370399796.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/nujugisodujin.pdfIn PDF document text
    • http://vo23.ru/upload/file/36797013545.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/80496566658.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/lokejorojupomo.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/zavozefunipud.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/sinazavedaniligis.pdfIn PDF document text
    • http://rld-carbon.com/file/kesobubega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=math+scanner+apkPDF link annotation
    • 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_off0000d1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 10296 bytes
SHA-256: bcd792f424288ca6e4b44e5692b8a434298f659ed6ec4fca9fb3737d9b3b8a91
font_02_sfnt_off000100ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 17012 bytes
SHA-256: e1d13d55f75f3ea99c125fb6f769531988d020f69b587786bbd2e2c10e629189