Malicious PDF — malware analysis report

Static analysis result for SHA-256 001c04a5ce860e94…

MALICIOUS

PDF

91.7 KB Created: 2021-03-10 20:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7af984834fb1fa14dffac896d005d442 SHA-1: 9bcc5affe79822185339514f068601332b7202c9 SHA-256: 001c04a5ce860e9407ca7d4c0bfb2bd524b430d4c4bb2777eeed70e6f9df8c27
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/123?utm_term=aztreonam+iv+prescribing+information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424985/normal_6024684e653d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408709/normal_6028190ac323c.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/ibKijhe/34227209033.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/haogd49/radio_flyer_walker_wagon_target.pdfIn PDF document text
    • https://wedisojurul.weebly.com/uploads/1/3/4/5/134515344/mibupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_6025f5b77cd21.pdfIn PDF document text
    • http://dom-bita.org/abu_garcia_silver_max_lp_baitcast_reelajpkq.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/P0Kjegf/ditexojefipojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416143/normal_5fcbf47d778d9.pdfIn PDF document text
    • https://jubolovewo.weebly.com/uploads/1/3/1/4/131453214/4563b0.pdfIn PDF document text
    • https://dadotetixaj.weebly.com/uploads/1/3/4/4/134404583/munamobi.pdfIn PDF document text
    • https://bilokomomaxin.weebly.com/uploads/1/3/5/3/135397692/sibawiduroli_janifulozizovi_relinodazuramus_watuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_5fe7a0456800a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_600e59853be30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_6041f08174e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_6024a167538ee.pdfIn PDF document text
    • http://pipvip.ru/85657591581dxv9d.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/S4yxMjc/48103935769.pdfIn PDF document text
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/b79170735.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/83149383581.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/egyptian_cotton_fitted_sheets_king_size.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/calculating_energy_efficiency_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/intake_and_output_record_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/desajibolezurugegal.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12805 5540 bytes
SHA-256: b94ae507a6f32dfbb7ca466601ebc32e212a036fe06cc6020489d13482355176
font_01_sfnt_off00013ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADA 11224 bytes
SHA-256: 94b06f0b762dd7d6d2e06192d4b9d59f659f42231091ceb41b37d40112c9fcc4