Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4194f3b1af7d52…

MALICIOUS

PDF

77.7 KB Created: 2021-04-01 01:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fbeac03812fb26cd450de8f7e037e108 SHA-1: 2065aa73a5737540683a65e2c1be7a8a564a1751 SHA-256: ee4194f3b1af7d52bde9c9457cccdf086b54e0d6c7571a7eb63bcf2e18631c3e
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, with a significant number pointing to disposable hosting and redirector services, suggesting an attempt to obscure the final malicious destination. The presence of a link farm indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=onn+dvd+player+ona19dp005+remote+code PDF link annotation
    • https://cdn.sqhk.co/tivanosox/hijhiav/jediberorewovo.pdfIn PDF document text
    • https://jofetafoba.weebly.com/uploads/1/3/4/4/134485710/moturijevupokol_pogoj.pdfIn PDF document text
    • https://jowanubeso.weebly.com/uploads/1/3/5/3/135399775/pagekubixapoj_vazunujifetu.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/LenUKgf/64603120314.pdfIn PDF document text
    • https://fajesafopumusid.weebly.com/uploads/1/3/1/8/131871419/013ae3961ecc51.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/ijagjhh/raza_meaning_in_urdu.pdfIn PDF document text
    • http://feedbacrnz.space/womanugetidcon7.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/7734924.pdfIn PDF document text
    • https://cdn.sqhk.co/julubesaf/EiMQjbm/android_webview_open_external_browser.pdfIn PDF document text
    • http://macsk.space/11563213825bja6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_7751463a1ca547d687d30c17e825bd69.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_cbcd952b314f47879d45cf925410038e.pdf?index=trueIn PDF document text
    • https://9301df3d-c689-496c-811c-0581e5fecd74.filesusr.com/ugd/f62067_3e0108cb34d74663a08cf012c0589b36.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff969a0c-254d-4d73-86ea-53008e47bd68/end_of_the_world_lyrics_juice_wrld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1badfff0-b4ff-4b0a-a2a5-d719d37c0ecd/36185405637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ec574e-57c1-4f7d-adca-d3c181ec926a/60533861086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a8f3a3a-dd72-4538-9229-f830d2c69398/what_is_verizon_ont.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F1 5444 bytes
SHA-256: 3048fa310ab9fa8ec22175a787a59fd1b13bd8674dca8a373272b366033cc45f
font_01_sfnt_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 10648 bytes
SHA-256: 184d6012faccd93be90eabd74bda1aed15fdbd9d023b0beab98bc8d0bde3fc42
font_02_sfnt_off00011b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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