Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddcd14bb4264842…

MALICIOUS

PDF

73.9 KB Created: 2021-06-16 14:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d84652be1a156a99714c9e069880e6b0 SHA-1: a79010ae13d2f93747a261e2d30eb49ff286f304 SHA-256: 6ddcd14bb426484259915d234e517ea1ee807b31cd021d7dcf664c02fcfd5f96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be directing users to external resources, potentially for phishing or further malware delivery.

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://nomylo.ru/uplcv?utm_term=vortex+gta+5 PDF link annotation
    • http://sity-luxe.ru/userfiles/file/wapulugivowazarusetevosas.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/vuwem.pdfIn PDF document text
    • http://aps-mes.com/files/file/fodateke.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/eg3nf60du70tosrknuj7b5vqsp/99396598395.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dd8efa4b0beaa73eef4ad49c2c9a4cfd/27000054684.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/zavir.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/zezot.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/ff91cee62349e65ddcb5fc136d8f4ad2/84492608936.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/571f4bdbb56dfcbfd4391089a82f587f/71278177156.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c59573914e1---dijojotodowo.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/91217319445.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/34408351820.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815037e5324---tovobukaxijukifuzi.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/e2abb4cb6ef36afd06608ba59a67d84f/wegelibogejabafasata.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077638f65a1c---nimatamewegonajukazatafa.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a1a563b3dd52ce9d77333f2a69b2dfb/41301634155.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/50422094271.pdfIn PDF document text
    • https://magerp.org/upload/files/sijosemol.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/pekifisofu.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_off0000e330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE330 4800 bytes
SHA-256: 75f83ec13692aecc5672bcf9293eff4ec711490c755519d1a1c76ac9fa1d1d06
font_01_sfnt_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 12376 bytes
SHA-256: 872eca533c3776da569fb296e63cf59bba2b43a10d9b54c4610b308de6e5182a