Malicious PDF — malware analysis report

Static analysis result for SHA-256 9856cd083f6929e4…

MALICIOUS

PDF

82.2 KB Created: 2021-04-28 04:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9f1dda7a3f6c7da099cd4ff92ce84e29 SHA-1: 26dd937d55bf525f6736861a65c1cf7cef852ac9 SHA-256: 9856cd083f6929e41d4e5a6ee2fcc3aaf4568ff011d082ed73799a78acc3b0a5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, including one pointing to 'botokaw.ru' which is likely part of a phishing campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, further supporting a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/strik?utm_term=tissot+t+touch+connect+solar PDF link annotation
    • http://begetus11ppz.xyz/27599398124jc3i2.pdfIn PDF document text
    • http://greatmasters.biz/how_to_use_oil_in_air_fryero2cyd.pdfIn PDF document text
    • http://formverifiedbadge.com/8326057045uydt5.pdfIn PDF document text
    • http://jerunuju.mypressonline.com/77689741057.pdfIn PDF document text
    • http://citruss.space/what_is_auld_lang_syne_all_about2dci0.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/catalogue_oriflame_juin_2020_maroc.pdfIn PDF document text
    • http://idealicaitalia-official.site/are_there_any_good_star_trek_booksiqs32.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/holistic_nursing_approach.pdfIn PDF document text
    • http://appless.space/fisher_wood_stove_instructions17nad.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/social_impact_assessment_process7fjok.pdfIn PDF document text
    • http://moxipafuxoxo.mygamesonline.org/how_do_i_use_my_nesco_pressure_cooker.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/Giigiie/nagobuzigovutenijepela.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/cnElodD/open_laptop_battery_dell.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://24976a62-ea59-4ca6-8500-d0bd08f9a094.filesusr.com/ugd/65a075_b9a5bcc5e10944e48916fc65ca01751d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/how_do_i_reset_my_hp_deskjet_2630.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/xekosurepapuguf.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/navien_npe-240a_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/first_aid_books_usmle.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_241280af04994946b00a32fea51f81e9.pdf?index=trueIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_f025d07c9ac942a2b622ea92a28e2960.pdf?index=trueIn PDF document text
    • http://rewuwuja.onlinewebshop.net/96773599930.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_8cb41685a28d44de9bdd163a661196f0.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_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 4836 bytes
SHA-256: f0dd160e66bf64592048f2e1d18774bce41df2bb38cb26531e5bc77d77d8abe7
font_01_sfnt_off00011643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11643 10852 bytes
SHA-256: 5ceb2ae11014bfc074a7c8b1866f3cce7465005ababcb677638fcec5b03042f4

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