Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc060479d4ef1e7…

MALICIOUS

PDF

90.0 KB Created: 2021-07-19 23:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: df8eaabfb8393aaa22cbaf2523696304 SHA-1: 5b1a370380ebde9a00b7ae3ac9356918248af847 SHA-256: dbc060479d4ef1e749140546b07a90696e081ec2a340c0613d266a4301fbc92b
164 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a lure suggesting an invoice or payment, and it includes numerous links to external PDFs hosted on various domains, some of which appear to be compromised CMS upload directories. While no scripts were directly extracted, the presence of embedded URLs and the overall structure suggest it's designed to lead the user to further malicious content, potentially a phishing site or another malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 http://banquat.com/userfiles/files/popir.pdf In PDF document text
    • https://luyenthitoeic.info/userfiles/file/tozisogusuk.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160703c26d651e---botorodapedogadagupemovep.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160940652aeef1---63231256473.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/31157661331.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/pizinofuzugase.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d62ef163c---fawafibemuzenav.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f3f443472---fabetetaxitilazepuwuwafe.pdfIn PDF document text
    • http://vtaky.sk/media/file/jimufox.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/duvititabarejixoriro.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/siwadedibesa.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/864ae5f484772e784df419c5014d45f4/39865967600.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/mofonuviriwogisabukunigi.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/dd1bf2a8be886c38f72a782855ba9ea2/sozoxivivak.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7756384b6f---60236335021.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b045f20630---20653837026.pdfIn PDF document text
    • https://makenie.com/upload/files/novagipejozalimuzuvabov.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/wevezamuv.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/pifuzad.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/su86nvnaoh77va1th845dmf9rk/lazunedogavuzojiwa.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/sivinaboragebobidulefivu.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16097ad1d10acd---volopewafapemigizakure.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae7929b5f1---nusivedapekasunenowerove.pdfIn PDF document text
    • http://die-elke.de/cms/elke_page_files/file/ruwufusuwenudukozo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=home+depot+store+creditPDF link annotation
    • 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_off0000feb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 17104 bytes
SHA-256: d367cdff22598ebb5ed574ea439d90234f9de2e6ae41a628077fe2f1ee48e40e
font_02_sfnt_off00014346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14346 10352 bytes
SHA-256: 035c0068e0f82330dbc0f12a433a36b3c754e3c6821a1c6acc385bdfee346960

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