Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c62057e1f03b059…

MALICIOUS

PDF

74.3 KB Created: 2021-06-14 18:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9a85fbd6f6eca0e801bda584970fbf5e SHA-1: a874af1252ac1d78efa90bec7e1e3a11e38fb810 SHA-256: 3c62057e1f03b059f39b5c562557bbcc9f46add47092da6d859da253604cc38d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to malicious content. The presence of external URIs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://garglob.ru/uplcv?utm_term=biology+notes+class+11+cbse+board+download+in+pdf PDF link annotation
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46fd741eef---lozunitoxomifefepex.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/01c66052906cb187c519e36db964b915/40945464971.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16092af418717d---mikotunesa.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/u5ulncn9oskm55r5r6bmj5rjn5/37477002403.pdfIn PDF document text
    • http://innotack.com/userfiles/files/relazalajawu.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/8261e7029e4eb1967cbb0357c7ad57f1/fapajoxugepakapowex.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/8f59aa7c65acb1cd94f5c84587fcfcc7/62797946918.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/buziromar.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/dcf7093ad419aa60e980a79bf7838eeb/kesitiwutosogabozis.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160890e2b7ec51---25427049736.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/82207888592.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210529221711.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/769550333.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082b7bd70a36---26935901268.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ad6aa0219---varifoveruwadisibonuvedav.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_off0000e39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39B 5756 bytes
SHA-256: 899b45be5ba0182ff0499fc2919887b3d709eb6cd53e1b71b962215b8decf446
font_01_sfnt_off0000f76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76A 11052 bytes
SHA-256: ea33bb67c710c3b0a0ae40019addb27ed968b4e1f29ac4739804a70eb54ed4b4