Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dccf9296232dc6…

MALICIOUS

PDF

85.0 KB Created: 2021-04-24 02:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f78c2f7304caf1dc2f3c384a03f1a801 SHA-1: aa8f50a41b6a52045bb05b48c22b4aa275b909c7 SHA-256: f0dccf9296232dc6c32110e8faa533efde772949cbe9d41de107191639f53e06
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains a search query that acts as a lure to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=can+i+wear+my+fitbit+charge+3+in+the+ocean PDF link annotation
    • https://cdn.sqhk.co/bomemenun/fgjEFji/logerosunib.pdfIn PDF document text
    • http://kojurebajalafaw.22web.org/mimumigonakipitelar.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/nVKQDuW/checks_and_balances_worksheet_8th_grade.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/gegobezalumifegewojed.pdfIn PDF document text
    • https://cdn.sqhk.co/japuwejede/fTSiihe/63486847670.pdfIn PDF document text
    • http://dedotiroviwef.22web.org/how_to_install_hp_laserjet_p1006_ink_cartridge.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/numolat.pdfIn PDF document text
    • https://cdn.sqhk.co/vikaxokaso/Ic3Miad/stick_war_legacy_pc_no_download.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/zimigujubat.pdfIn PDF document text
    • https://bijariruxo.weebly.com/uploads/1/3/1/3/131382387/e1da06601814.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/3YhgbyB/60716706265.pdfIn PDF document text
    • https://joxeluduxena.weebly.com/uploads/1/3/4/7/134772203/rixotunopigadij-nifetem-vuxuvup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boxakuwila.epizy.com/foxpro_wildfire_2_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc69dc0-6c2a-4e9b-9125-680da179548f/2008_yamaha_v_star_1100_classic_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a2b852-07c3-4cd2-ae48-62d000ece52c/18373075603.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/kugamatadoko.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/already_yet_present_perfect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16120bac-cc80-4f40-b9dd-6001fdd58a67/lost_girl_show_season_1.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/kexewubotivu.pdfIn PDF document text
    • http://pidawuz.epizy.com/fubudoguzasomisekizawiw.pdfIn PDF document text
    • http://pofijiserige.onlinewebshop.net/17913007996.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/symbolab_calculator_apk.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B7 6424 bytes
SHA-256: 4455747fda9ac97410526ac3fee3ca643cc61cb592146befb7df79af2604d95b
font_01_sfnt_off0000f699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF699 5488 bytes
SHA-256: f335cac77f3f2daa1204e47af6ef42bc005a1473e5f73f25211fd6091630344d
font_02_sfnt_off00010941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10941 10936 bytes
SHA-256: cef384453471e55ad47f117b1ce806ebc8b69fd8872334cfef68d5a0a7beeac7
font_03_sfnt_off00012ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF0 16148 bytes
SHA-256: d612c605d101522a7b082cd092ef78b209dae850c4a5e940dd0f53fb1bc5669f

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