Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f8f216b9e21601…

MALICIOUS

PDF

83.3 KB Created: 2021-03-05 03:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5c468a018f2c4ada9d728266c6f6abeb SHA-1: cd7c20d5187e86af61c7a25e6705ca6552886b57 SHA-256: 26f8f216b9e216013cd3c34198219030865b4b93a65d79d0d26c711cf52de908
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The presence of multiple PDF links suggests an attempt to manipulate search engine results or to distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the links strongly indicate a phishing or SEO manipulation attack. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/123?utm_term=netgear+gs108tv2+default+password PDF link annotation
    • https://cdn.sqhk.co/jinubodilev/hYgjjgj/facebook_business_suite_cost.pdfIn PDF document text
    • https://kazubuxupopa.weebly.com/uploads/1/3/2/6/132696048/9336530.pdfIn PDF document text
    • https://losasogewago.weebly.com/uploads/1/3/1/4/131437886/5889330.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/jdSsaHA/99071334832.pdfIn PDF document text
    • https://jodeliloku.weebly.com/uploads/1/3/5/9/135975589/f4d334db285028.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/magodek.pdfIn PDF document text
    • https://zupudawuliwubil.weebly.com/uploads/1/3/4/2/134265939/3149015.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/bdd_full_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimufigekufeta.rf.gd/53928224112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a3e17b-f1ca-40d7-93a0-c39f776e5d6d/brother_mfc-j5910dw_inkjet_printer_service_manual_and_parts_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/guc_english_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/goravites.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/namesulojosemowovafaxixa.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/nuvojekozinekubukarosop.pdfIn PDF document text
    • http://zefuziboveteg.epizy.com/types_of_audit_report_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a56ae5-7efa-4f02-bc56-5c9faba91193/cochlear_nucleus_7_cost_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3c0f73-6550-4284-8bc6-4285703a7833/venn_diagram_equation_solver.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/simple_product_backlog_template_xls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965f6604-b87b-4dec-bd88-42a3efdf9876/36740787358.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/le_petit_nicolas_film_questions_de_comprhension.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_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 5852 bytes
SHA-256: 70e1a09e318b90f7966d1a943163865c6b4fca9a7f3cf59c0f8b65088b488e93
font_01_sfnt_off0001181c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 11976 bytes
SHA-256: 81d172cef73124b9993dd66d4242a9ffd1dc65e70f0ffc556d88064ac793f449

Open this report in the interactive analyzer, or submit your own file for analysis.