Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8314ab8c1b5cfa…

MALICIOUS

PDF

78.5 KB Created: 2021-09-24 23:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 02e812cb68d6978d64677a53ae0022b6 SHA-1: 7540e7132e55fec2284c0cc1d9cb676ae876b6ea SHA-256: ed8314ab8c1b5cfa64eb731d8920f03729e5dcbb180d7c679f703147654abdab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://chcial.ru/uplcv?utm_term=frp+bypass+sms+apk PDF link annotation
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/82527023285.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16142995f5c36e---sapepujebukidavevanunuva.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/68308430314.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/310222a0371c36384ee6c63b4535a35d/tojirisomozofejuxi.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/5cqo0vkfj7ne6nsrflfhavevmb/wefoxaluraxagujilojubo.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/2021916152486962.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/zodipagutopir.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/fevumip.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f8bef5a786b996f429f5b2b8b156459d/nutavugobevi.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/66018504210.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/girixogugedawigeme.pdfIn PDF document text
    • http://th-hl.com///upload/files/55522288642.pdfIn PDF document text
    • https://togelunited4d.com/contents/files/lexipizujubonovenuzafurux.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/17958345025.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/bofimujapijol.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/b67hpojmkvjvoefonvo9uv5jl4/35334049972.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/1276431613614390c32271e.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/77175883293.pdfIn PDF document text
    • http://sissonne.hu/editor_up/sivowikimunosubupibug.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/tanijuvopifosabusugulo.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/dameji.pdfIn PDF document text
    • https://krossi.ru/images/content/files/vedidelofunatepa.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/fonojixup.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/gotiwololamakosago.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DA 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684
font_01_sfnt_off0000cdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAF 17924 bytes
SHA-256: 654ee4e6f1afcd623516f8beeab12fdb665f24f6895799ccb8ab2d526b927093
font_02_sfnt_off0000fbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 10144 bytes
SHA-256: a0863e9a94ce9784eee37ea2121e7f7546182150cbb31faa55cb6e36f5e295be
font_03_sfnt_off0001123c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.