Malicious PDF — malware analysis report

Static analysis result for SHA-256 5274862278da8dfa…

MALICIOUS

PDF

69.5 KB Created: 2021-09-19 02:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fd5502cd901bf488f6de54a62a730fc6 SHA-1: 4e302753e4c22128cc8272787099e4581d89c56d SHA-256: 5274862278da8dfa731642d8f0aec654a334cf9ed7b67a286e75066f62f4e02c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-based lure, typical of phishing campaigns, designed to trick users into clicking embedded links. The presence of numerous external URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a larger phishing or malware distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://chcial.ru/uplcv?utm_term=call+recording+hide+kaise+kare PDF link annotation
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/87336979368.pdfIn PDF document text
    • https://mimpidia.com/contents/files/kezabekebujusati.pdfIn PDF document text
    • https://rubfila.in/files/file/65736301230.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/10829155763.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/wopepewif.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/88201998210.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/ranadajebujefupemurew.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/22637587495.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/xexisefasilu.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/58933093540.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb32c60f3b---81796220218.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/48430163355.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/81842298282.pdfIn PDF document text
    • http://freeorden.com/media/file/binod.pdfIn PDF document text
    • http://ruiqingchem.com/upload/files/detalabusaj.pdfIn PDF document text
    • https://laser123.com/geektic/files/92557001410.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1631896309datuvejuxugidugusowitax.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/2857191930.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/jinevexefubudol.pdfIn PDF document text
    • https://mahae.hu/files/files/zapusutopagukatijoxosu.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/pafukixowanoza.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/vopukinekifegexu.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd1b5c5b98---95057209651.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/venimuradodanonakap.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/nikipagakigubarasu.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/pagiki.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/vawelosegatew.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_off0000b48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB48A 10676 bytes
SHA-256: 8de7259a99934f51f82093a4dfadfc5ef8f4a872b810b0d5bb7e9bc36f3f92eb
font_01_sfnt_off0000ccb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C3 14140 bytes
SHA-256: 7563a8d82328ab2b25b6e98d911f530be164c7f6122878755ab08eb728abfb8c