Malicious PDF — malware analysis report

Static analysis result for SHA-256 01013d2b39bf538a…

MALICIOUS

PDF

80.7 KB Created: 2021-10-27 07:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8e9f96931a0535942fa7438a3ebc4b19 SHA-1: 6023987f87010574105c823e7a6a29d41e51b3fc SHA-256: 01013d2b39bf538a76fb9b2a6d467fa6dbe62006f4901fae875f6f078cc86663
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The primary purpose appears to be directing users to potentially malicious websites through a deceptive link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pistant.ru/uplcv?utm_term=prayer+for+praise+and+worship+tagalog PDF link annotation
    • http://suyogmaratha.com/editorimages/file/40158936446.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/muvolo.pdfIn PDF document text
    • http://travellerisland.com/files/wubawevaxiwataseme.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/84802371342.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/lulawusabowusaragez.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/30469132952.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/xexileg.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/61654897238.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/61970374832.pdfIn PDF document text
    • https://gangnampools.com/contents/files/kazabejudoxulosirede.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/80010607903.pdfIn PDF document text
    • http://chpcentre.com/files/file/12015072335.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136fdb999e04---fuwapoxavud.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141399bc7549---vofetugevetuxaruxuduxe.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161608f25e788b---getulezitub.pdfIn PDF document text
    • https://thietbigas.net/media/files/20568827716.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/25426739615.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/87045965426.pdfIn PDF document text
    • http://profiklub.sanswiss.cz/files/file/91173939143.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///38937972832.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/92038609587.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20211023021743125.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_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 10976 bytes
SHA-256: 8b530f7b1b26545e7213f43c9d84425f2ab2ff4eedb53b513fc063e913c467a7
font_02_sfnt_off0001085a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085A 17536 bytes
SHA-256: 93cf277b481f7ea38f6de2bf95835e6be19f37efef21a40ac63d9bfa4778bb00