Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83d9beff5b45af1…

MALICIOUS

PDF

94.9 KB Created: 2021-03-21 09:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d94c22b13350453225f8e69ab1e74b1e SHA-1: de1cdffb500b5f23a1b614d1477838ed907417fe SHA-256: a83d9beff5b45af1702996d5b515913e60a1c14b77f49f89f06551fb0546ea67
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, pointing towards a phishing or spam campaign. The embedded URL 'https://jumiwimov.ru/123?utm_term=leveson+inquiry+report' is a primary indicator of a malicious redirection or download attempt.

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/123?utm_term=leveson+inquiry+report PDF link annotation
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/mebalugavik.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/5360607.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/uZhbibg/vuvuvonu.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/vuras_runedo_lijemobasevige.pdfIn PDF document text
    • https://cdn.sqhk.co/bujedebi/f9qhh9s/613545489.pdfIn PDF document text
    • http://fudopajir.iblogger.org/5_ejemplos_cortos_de_discurso_directo_e_indirecto.pdfIn PDF document text
    • http://noziwop.22web.org/song_of_solomon_online_book_toni_morrison.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/6e99ec4f00b.pdfIn PDF document text
    • https://zegikawa.weebly.com/uploads/1/3/4/6/134640481/nelekon.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/nighbUc/49013529970.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/hajgQmM/potadexotutube.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/3mic0jj/28251142172.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/perguntas_tag_casal_quem__mais_provavel.pdfIn PDF document text
    • http://puxejinasor.epizy.com/modasozisubewazejavebomi.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/85012626568.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/california_university_of_pennsylvania_information_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/77954737925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d1805f-5ff3-4b0a-9eee-6180bc4bae5f/what_is_the_power_of_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/175aac70-372f-48c3-af5d-b1b8463aa4fe/27473795752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c062753e-fefd-4e48-b69e-81307af17a95/order_ikea_catalogue_2021_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d3d373-17da-4b37-8f45-d8a67e4c9e37/towevubereremirorolesif.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_off000122e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E8 4800 bytes
SHA-256: 8865a11375399b96ccb58e1c2d3d3a6c1451e439fe8a22878b73c13ecad47271
font_01_sfnt_off00013363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13363 11124 bytes
SHA-256: b80a07a68c870a8559591f9b44deb551283355a1acc3b6a4db8e444b406e0c8a
font_02_sfnt_off00015998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15998 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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