Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a8f7ae19d51327…

MALICIOUS

PDF

74.4 KB Created: 2021-03-14 01:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0ead376daa8300b9f5b38644eedb6676 SHA-1: 3d785dc705e66e4fbb7823865bccbd1d56b22289 SHA-256: b7a8f7ae19d5132798cbfac68a25f3717380c1d6bf708af65c5c8b8129fd3cfd
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to appliance troubleshooting, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=how+do+you+reset+a+kenmore+elite+oasis+washer PDF link annotation
    • http://xalenupom.getenjoyment.net/dibutizafu.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/call_of_duty_ps4_price.pdfIn PDF document text
    • http://jipujitematane.iblogger.org/uniformes_colegio_calasanz_medellin.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/lelafuletupusubomixuja.pdfIn PDF document text
    • http://xalenupom.getenjoyment.net/titulirabozizomu.pdfIn PDF document text
    • http://fiziwovana.22web.org/85119451268.pdfIn PDF document text
    • http://babitilakibo.mywebcommunity.org/18150789531.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/gogojidosigesib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a43ce2d-5d97-4110-8d7c-9b05bfe5de46/42642978629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f13fd4e-5dfa-442c-a189-1ca24018082e/how_to_connect_to_altec_lansing_baby_boom_speaker.pdfIn PDF document text
    • http://binalidagu.epizy.com/rubekunosukevowosereda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70987e38-01cc-4dcc-9041-148f6adc2070/zujuvatapan.pdfIn PDF document text
    • http://suvapik.epizy.com/a_garland_of_forgotten_goddess.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/can_you_nap_with_daily_contacts_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2df3e1-d4c6-4e4c-bc66-d6f425404f61/fuvipamagabifinu.pdfIn PDF document text
    • http://zotubune.myartsonline.com/11593290116.pdfIn PDF document text
    • http://katogokusow.rf.gd/prisoner_b_3087_quotes_about_perseverance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d18c3e9-46b1-4647-876d-2f01b030590a/lebijofadoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f369470-e500-4332-b434-f38cb367a2d9/22503760073.pdfIn PDF document text
    • http://diremize.epizy.com/tree_of_life_armband_tattoo.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_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 5284 bytes
SHA-256: 70866163b0e00e8318728dbbcb30673685538677e969f90a952eea0d655bef37
font_01_sfnt_off0000f7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F0 10512 bytes
SHA-256: bf8ecafa521ea801401133bb9d77848b7afce344b923c210fd40c9191925b714

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