Malicious PDF — malware analysis report

Static analysis result for SHA-256 02796aba4d425e2b…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 22:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 30f07cd25e02acf0f580b5889cde4cbe SHA-1: 5c21b4c2b4056e640afe397a98b70ba3964432bc SHA-256: 02796aba4d425e2b47be0485bed57add928808b57c52fe11fa582e69444d6fca
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable domains and are used in a link farm configuration. The presence of JavaScript suggests an attempt to execute code, likely to redirect the user to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=iphone+6+bd PDF link annotation
    • http://pomelieagency.com/userfiles/files/36906321095.pdfIn PDF document text
    • http://ausafe.net/images/art/files/kujeposigijerexogitapu.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/28653098137.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/renotaligugasuze.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/97283434689.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/58602134660.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/sakizavavemegapowala.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1631714279.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/72070408637.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/difevapunibutazena.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/18832423558.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/93104266008.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/kopabuxu.pdfIn PDF document text
    • http://prmakeup.com/Image/files/porexivifixoref.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/fadiluvetobekipevijus.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/febewewatikuxexanafavele.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/0055866082.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/fitinoj.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/fekoxodexenuvilogi.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/sejel.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/27034758306.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/zakobegudefatitasakuxa.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/dosiwi.pdfIn PDF document text
    • http://weldingplaza.com/files/file/84016138711.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/11371965881.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/k191ja33e23smqpquuiqiiulme/35631339892.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109161311453010.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_off0000d9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 17920 bytes
SHA-256: 30dba9eac4600c51a866c6065d585283b9fc4d98440e3862c3198281ad90ffc6
font_01_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B4 10080 bytes
SHA-256: 167e6b1ef338a01360b2df747934675b2fc62d6ed63a550da789d8b8f74b00df