Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0a7f2c91b5a9aa…

MALICIOUS

PDF

76.3 KB Created: 2021-03-18 03:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3b01b3ef2bee50819777eda9c1f71132 SHA-1: 5dd283f588d823cd0a299e7cab9b57eac95126bf SHA-256: 9d0a7f2c91b5a9aa1b855d3c2a194b39a5e1e8d710cc663d87a932715826acfe
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a large number of external links, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of external links, including one to 'botokaw.ru', points towards a malicious intent to redirect users to potentially harmful sites. The document body contains garbled text, indicating it is not intended for human consumption.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://botokaw.ru/123?utm_term=beaverkill+river+fishing+report PDF link annotation
    • https://cdn.sqhk.co/foxoxaze/hjfhrjb/38484897430.pdfIn PDF document text
    • https://cdn.sqhk.co/nabotogemobe/ihhdgfh/nozifaki.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/g6Phahg/uber_fleet_app_store_ios.pdfIn PDF document text
    • http://pogolaf.iblogger.org/carryall_500_service_manual.pdfIn PDF document text
    • http://juwapes.22web.org/fonewikonimojute.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://monawob.epizy.com/what_is_7_years_song_id.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/strong_pools_and_spas_reviews.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_005477cc7a624271a5144d79678f6831.pdf?index=trueIn PDF document text
    • http://bixikaw.epizy.com/26425401858.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/23336123122.pdfIn PDF document text
    • http://xijuwevame.epizy.com/how_much_does_a_deputy_principal_earn_in_nz.pdfIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_36411bc6674f45949dc92ee3fc50305d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gitipelut/82130357967.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/cdrl_dd_form.pdfIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_c1f26c42abfe4a49ae9eabb57f99f258.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/15475357705.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/horwath_hotel_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/wakenozulodisufexa.pdfIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_9ba6b16486a74c008c986a88b8db608d.pdf?index=trueIn 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_off0000eda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA9 5336 bytes
SHA-256: 7b43ede966e51ac7c33f1314479323d574680a80683e792e79b9ba9468cbbf33
font_01_sfnt_off0000ffdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 10512 bytes
SHA-256: e30992d10bc699434f0d2f80147bbddbff82f336783beebd0967954a07a109a2

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