Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ce4338734fd304…

MALICIOUS

PDF

70.6 KB Created: 2021-05-12 11:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ee4065f018ab1624dd37b8b1e22a5634 SHA-1: 9342fbfd7af5031d87b0b9523ee086fd5ae7bb33 SHA-256: d7ce4338734fd3043022b66f77b5938099aba08c18f8c5803ff47808f144cc9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=anticoagulante+edta+pdf PDF link annotation
    • https://accesoriosalmayor.com/images/userfiles/file/82301990452.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/87235773302.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/a8c946378e210b850b9aeca1bac584b2/41714892023.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/40987292093.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/cvfsidpo3uitjuudh921srhrr3/91523854646.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/98459607566.pdfIn PDF document text
    • http://dentherapia.hu/files/file/41606595040.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/7ces2qt331tfhu3tapo9uk12ce/70501859571.pdfIn PDF document text
    • http://gyobel.itpublic/file/1372533569.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/52166559511.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/6jum5i91tt1jr2ujvv1umahh35/51261423768.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16081830a5d4d4---8480521119.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609042cff0a5c---13956150062.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1609a16a10771a---15976489570.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/k8pnk83oqpdpfdhtgiiud7dlc3/57733555538.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/lejinumebanaketetoji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD690 5036 bytes
SHA-256: 184c6418f1d18301c1a9d85f9ef052a80ef9ebd0e021370e0f494c1886671e9c
font_01_sfnt_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 12516 bytes
SHA-256: ff181111d6d0679dc9bdd178570392ad9567df11cd8b70605f5fcb106cbd39cc