Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79dfbdf05db69b4…

MALICIOUS

PDF

88.0 KB Created: 2021-03-05 05:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d9bf86c82f60ef4ac4d9d7d63610eb48 SHA-1: 56265101373fcac7617b292b965ae2e089c338ae SHA-256: d79dfbdf05db69b444f85c4239d3ed1433021a48613e8493ee4298927d79d789
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://soxebez.ru/wix?keyword=does+chase+bank+buy+pesos PDF link annotation
    • http://hs-life.ru/stealth_cam_trail_camera_sd_card_formatiyzy1.pdfIn PDF document text
    • http://namixojebeku.iblogger.org/qcy_t11_review.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/38937587481xunzg.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/mejopexid.pdfIn PDF document text
    • http://helper-badges.com/dewalt_745_table_saw_zero_clearance_insertw7ird.pdfIn PDF document text
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/63fc19536c70d81.pdfIn PDF document text
    • https://jodalutuz.weebly.com/uploads/1/3/4/4/134444421/8171188.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/can_you_get_unsaved_snapchat_messages_back.pdfIn PDF document text
    • http://zokupez.mygamesonline.org/kabubumirepa.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/76561996a7bdd8.pdfIn PDF document text
    • http://lastasked.com/alfresco_community_5._2._3s0aci.pdfIn PDF document text
    • http://dududuw.mypressonline.com/how_to_set_the_citizen_eco-drive_skyhawk_watch.pdfIn PDF document text
    • https://tovorugezix.weebly.com/uploads/1/3/4/5/134599805/6a15b24d2.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/bubeto/adjective_phrase_worksheets.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_552942c5870742f5a9bba1ad2333818e.pdf?index=trueIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_c1a5de7abfe6477f82493cd8f731f50a.pdf?index=trueIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_f3b226915618452288af26762d897a42.pdf?index=trueIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_273ec4382e3148718c7a07b4a6819e53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuxime/11561094632.pdfIn PDF document text
    • http://dasudigakufise.rf.gd/toxuxelabotut.pdfIn PDF document text
    • http://juropotixomiwe.rf.gd/59628155886.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/938086204.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/rivibepupog.pdfIn PDF document text
    • http://zabesawafusoxa.rf.gd/cadets_uniform_2018.pdfIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_f347153e346d4c76a9340073e6ef6e1a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanaladu/vestir_sinonimo_formal.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_off0001061d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061D 5200 bytes
SHA-256: 761a8c73bc4095218e6483cb3f5bb8e4c386e0020c488d6563789974733d5980
font_01_sfnt_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 10928 bytes
SHA-256: 3176e09aa21f88377bef425e885afb96a17e99eacb3a2191223cbd73d6c99fe6
font_02_sfnt_off00013d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5F 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e