Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2be43c78c259d6…

MALICIOUS

PDF

75.8 KB Created: 2021-03-22 06:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 56592f8a9cebac61c9bdc33ca497b5f6 SHA-1: 58f903c0487f88b424a4ef4ca7859ca65090db27 SHA-256: df2be43c78c259d642e0c5c913790640f3cae77217a22ea1b0fd6a265f0ddebc
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9997

Heuristics 6

  • 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 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://xajibur.ru/wix?keyword=pdf+daily+planner+2020 PDF link annotation
    • https://cdn.sqhk.co/titukopano/JjjmxTY/nirozupevelisuda.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/jjbjahg/firefighter_paramedic_salary_new_york.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/cardiopatia_congenita_mas_frecuente_en_mexico.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/kaserulabibujawela.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/jhhhOgF/mishary_alafasy_nasheeds.pdfIn PDF document text
    • http://lordtrans.ru/get_dun_and_bradstreet_credit_reportvnjdi.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/1jjglhf/litujizuvafozesejitopudo.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/fevezu.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/hb17U65/nulupezofovek.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/jehddig/best_virtual_family_games_online.pdfIn PDF document text
    • http://copytoshka.ru/how_to_adjust_sewing_machine_tension2e24a.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/logitech_z-5500_control_pod_bypass_cable.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/QghGzBJ/xipadejabenafam.pdfIn PDF document text
    • http://doordash.link/astm_a182_f6rclph.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/Xibgdie/hero_xpulse_200t_bs6_top_speed.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/56860446300.pdfIn PDF document text
    • http://freds.space/amar_chitra_katha_books_downloadymmxd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_eae1355c56b64ea8a20644144dbc4c84.pdf?index=trueIn PDF document text
    • https://70745723-7f4a-4dc7-98be-95bdce43cd82.filesusr.com/ugd/67bae7_a538f072436a4830a2e47796a7219c0f.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_bff44b21f3c84a30bbaaafe268983fb6.pdf?index=trueIn PDF document text
    • http://gototura.myartsonline.com/fofolumedolufovupomolimov.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_off0000eafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 5232 bytes
SHA-256: f87b545562e941f538eb6c54e720af29ceb5530a0b3f49099532f44c038054dc
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 10916 bytes
SHA-256: b632e257c97efd970e3d9e39ee16d663bf235a1e81f91710271e2a7919d79b14

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