Malicious PDF — malware analysis report

Static analysis result for SHA-256 41710f7efc5e3060…

MALICIOUS

PDF

75.1 KB Created: 2021-03-08 13:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ec9d47b9ce59395f3a93f64023945e2b SHA-1: 0584d81ce45eed92eed41f9f959aabeb6488e395 SHA-256: 41710f7efc5e306069e03a86e29f478f0502ad66d179e9b63daee729f0533008
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to a site associated with phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. Although no scripts were explicitly extracted, the presence of external links and the ML classification strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://pelibifir.ru/123?utm_term=voluntary+acknowledgement+of+paternity+form+georgia PDF link annotation
    • http://lordtrans.ru/ruxeloxony3oj.pdfIn PDF document text
    • http://moviesaddaa.online/sizaruzevew72bwp.pdfIn PDF document text
    • https://sixixufur.weebly.com/uploads/1/3/2/3/132303163/dalojosutiwuki_kidanagimomomur_sedafulorusagu_xoponaravilawiw.pdfIn PDF document text
    • http://porn77.design/ravaliwibarevimodomurixenoozjw.pdfIn PDF document text
    • https://febadezupuwile.weebly.com/uploads/1/3/1/0/131071278/gosikonitirasiligi.pdfIn PDF document text
    • https://mujiwirum.weebly.com/uploads/1/3/4/6/134613500/cd4c93491.pdfIn PDF document text
    • https://sorafenime.weebly.com/uploads/1/3/4/3/134320910/1486682.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/764bb2f93f5513.pdfIn PDF document text
    • https://mixodozom.weebly.com/uploads/1/3/4/3/134333910/9938316.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/jufowokedunod/ugly_christmas_sweater_song.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/80171222823.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/kovimo.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/37189717413.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/fesuxudiwalulasavonurik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b18057a8-c244-4b68-b975-ca94982a9062/97626406348.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/23122941396.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/excel_formule_arrondi_au_multiple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164bf715-73af-420c-bae8-c644212dff27/relapse_prevention_plan_worksheet.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_off0000e6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E7 5520 bytes
SHA-256: 6a4b805dcc62de60f18655ef0f624d008f605de589c1a39b3a6e0a60c024b24a
font_01_sfnt_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 10788 bytes
SHA-256: 77f9b0088b290040d5a70101954c287e3173486507af8cfd16178409bcec4381

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