Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5467b56dbc4ca3…

MALICIOUS

PDF

82.0 KB Created: 2021-03-19 13:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a54f21eda8fc852d27c03969b72bb3ce SHA-1: fd9c3451d773b3d1926b092130c450c407ab1d2d SHA-256: 9f5467b56dbc4ca39b972ce0e3c639d24af2d14af65dc3aefba5317c1bc11bf0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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://jumiwimov.ru/award?keyword=englisch+%25C3%25BCbung+simple+present+present+progressive+pdf PDF link annotation
    • http://sezutupinamizan.22web.org/57745907024.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/dibjiPZ/mefeku.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/c9XCBgh/car_dealer_simulator_mod_apk.pdfIn PDF document text
    • http://axecheat1.xyz/harmonize_niteke_lyricspn1ke.pdfIn PDF document text
    • http://vivezotutune.iblogger.org/flood_in_kerala_2018_report_writing.pdfIn PDF document text
    • http://shopyou.online/fomazozafojibalum1h9af.pdfIn PDF document text
    • http://usecabinets.xyz/28682066985n0bk4.pdfIn PDF document text
    • https://cdn.sqhk.co/kunutewiwit/eeE1Iih/fapovovekegigi.pdfIn PDF document text
    • http://remontnatali.ru/candidiasis_oral_2017wylpw.pdfIn PDF document text
    • http://ketadiets.site/asi_hablaba_zaratustra_audiolibroz2zv7.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/ef744dc5-3987-467b-8830-b4eb7fc1c34c/92444118209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb89667-4cfd-404c-874f-48f0cd92e17b/blank_one_hundred_chart.pdfIn PDF document text
    • http://xododanigijexo.epizy.com/66937780818.pdfIn PDF document text
    • http://faruvesisok.rf.gd/weather_kheda_report.pdfIn PDF document text
    • https://d1b6b380-f15b-462b-86b5-0b089ba7d90d.filesusr.com/ugd/f99a33_a8553401ee374b91b5bee3a941402850.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4675e72b-7c39-44ad-86ad-c033a4bc5eaa/rezonixegepagawekuwugo.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_a2b4e63b9d224a598aeb242d0edf5cec.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_b02d785bec874d78b7c53f937207999a.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_9f416d49293a433bbfa2394d86c8223b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/56114531-e3e9-4ff7-8b37-6e3a6344f2d9/ib_chemistry_textbook_oxford.pdfIn PDF document text
    • http://lalavuzotijosi.epizy.com/wagner_905_power_steamer_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 5636 bytes
SHA-256: f1fa06fb40127cd01f982f18cc4bb0f5fba1b4d3b27f894b260d25846d1811ab
font_01_sfnt_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 12220 bytes
SHA-256: 0fffe8ed6965b7b5d6d9f1a42d851761eb53ca662548f3de89932a027695a58b
font_02_sfnt_off00012278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12278 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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