Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a303a8508a1ec7…

MALICIOUS

PDF

96.6 KB Created: 2021-05-09 09:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d26d799aa9972870fcf67a36dc728086 SHA-1: 7799cf2084b297b1ad4ac01fe15bd7d0567eaf29 SHA-256: 30a303a8508a1ec76490a407d72c9287ec34e2761831749d3fc3d08764328be6
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The primary URL, https://xajibur.ru/strik, is suspicious and likely leads to a phishing or malware distribution page. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to 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://xajibur.ru/strik?utm_term=burger+king+restaurant+close+to+me PDF link annotation
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/derixadibitisu.pdfIn PDF document text
    • http://wwnews.site/adobe_acrobat_x_pro_windows_10480ok.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/ggiaohf/13031303027.pdfIn PDF document text
    • https://daxoruliwoj.weebly.com/uploads/1/3/4/5/134585145/d295901d8f6dc2e.pdfIn PDF document text
    • http://widaget.22web.org/38058995034.pdfIn PDF document text
    • https://cdn.sqhk.co/ripowusaro/gejlc4R/33703507730.pdfIn PDF document text
    • http://gutprod.xyz/cutting-edge_cabinetmaking6tmqr.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/JMQhcaI/groupon_merchant_customer_support.pdfIn PDF document text
    • https://cdn.sqhk.co/dolubivo/6HCxGge/70457620571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satazajofi.rf.gd/95917000135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9f3579-e89d-4d7c-8440-854e47ab0fb7/where_can_i_go_to_donate_toys.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/zedirabudikasetu.pdfIn PDF document text
    • http://zituwot.epizy.com/digital_electronics_notes_for_gate.pdfIn PDF document text
    • http://lumawasisoxo.rf.gd/96142084264.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/70042931743.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/adjournment_application_format_income_tax_officer.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/biugo_video_maker_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcad9d65-d7e1-4c30-827d-5ad4940be150/united_colors_of_benetton_shoes_online_shopping_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/ferrari_488_pista_for_sale_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8e3f56-6875-4d46-b636-59436da0cae1/kitchenaid_stand_mixer_colors_chart.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_off00013c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2B 5232 bytes
SHA-256: 907522e4b2a60782caa05b6601adb24dd49fbf939d9978f5fe9bbdbaa7f2fd55
font_01_sfnt_off00014dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DEE 11588 bytes
SHA-256: 315eb66c4032f598dc1b56233f946f2953fa240d97d31558e56c07125ee7fe83

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