Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26960a010302a0f…

MALICIOUS

PDF

136.5 KB Created: 2021-03-31 23:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8726d35233bcd1c40647214baf6c3cb9 SHA-1: 3deb4c1afcb2df781b3102f0bc90d8a80929b2a1 SHA-256: c26960a010302a0f1be7255fe5cc3db282d5860601d4f12e5d9207e7489db33f
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://xajibur.ru/strik?utm_term=panelview+1000e+upload PDF link annotation
    • http://nobirejajatit.iblogger.org/integrated_reporting_cima_f3.pdfIn PDF document text
    • http://busapibasin.mypressonline.com/animal_farm_analysis_essay.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/ZggieH5/78126700243.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/83585208809.pdfIn PDF document text
    • http://xezobofelupazat.22web.org/sleep_hypnosis_guided_imagery.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/xaluv.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/wuzenukuraxotu.pdfIn PDF document text
    • https://zadobezaja.weebly.com/uploads/1/3/0/7/130775221/230330cd245a22.pdfIn PDF document text
    • https://rurinigumiza.weebly.com/uploads/1/3/5/3/135350695/terofenovelagarapoj.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/63753457790.pdfIn PDF document text
    • https://xokebewogaxuwu.weebly.com/uploads/1/3/4/5/134588239/xubetidafalajiruwob.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/fghHiay/thorogood_work_boots_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ruwapebubori.epizy.com/bd_govt_calendar_2019.pdfIn PDF document text
    • http://tupadusemorejo.epizy.com/4799190631.pdfIn PDF document text
    • http://bulofowomogi.epizy.com/fifty_shades_of_gray_book_quotes.pdfIn PDF document text
    • http://bugifumamulax.rf.gd/galasedosonufelumebo.pdfIn PDF document text
    • http://gisujibegu.epizy.com/apprendre_le_solfge_piano.pdfIn PDF document text
    • http://zopefunexot.epizy.com/display_amount_in_words_in_crystal_report.pdfIn PDF document text
    • http://dusijilesa.rf.gd/83598196914.pdfIn PDF document text
    • http://kibuwigukakew.epizy.com/motekes.pdfIn PDF document text
    • http://jaluwapuleg.epizy.com/kaxojudugi.pdfIn PDF document text
    • http://pomirunorejuso.epizy.com/excel_cheat_sheet_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD92 4828 bytes
SHA-256: 5dfd2f833a73a3f1088652923f322a42e38a236d4999eab21e7fe41e07e978fd
font_01_sfnt_off0001de13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE13 11976 bytes
SHA-256: bd3d17ec1a2842ad7ab9ce2584d527a1d25b17539e83b728456e6bb19acba6c1
font_02_sfnt_off00020650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20650 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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