Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cfeebc8e2f7b3c…

MALICIOUS

PDF

83.2 KB Created: 2021-03-24 11:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 27804f56ce70538e3aca6a64dd9c50ff SHA-1: 10ff0b88d1eb28121406fec547f54e7aac937ce3 SHA-256: 04cfeebc8e2f7b3ceccd72f1407d2c476efb06dd7d3e5e0f323d60b10c94633b
134 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous external URIs and is identified as a link farm, suggesting it's designed to redirect users to malicious sites. The presence of a download button lure further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/award?keyword=laszlo+bock+work+rules+pdf+download PDF link annotation
    • http://diganez.iblogger.org/training_certificate_template_ppt.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/bihar_police_book_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5fc773119b7c0.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/rorapivunadaxuzoti.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/peledubisesisemeba.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/87752759270.pdfIn PDF document text
    • http://tadajixilatu.scienceontheweb.net/55281675844.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/6427176.pdfIn PDF document text
    • http://vazukororupob.22web.org/journal_articles_on_autism.pdfIn PDF document text
    • http://wuvudazesog.22web.org/wekefoxajanifuwoxixudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_6015ce1477363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_603ba30014ef9.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/basics_of_all_programming_languages.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/2565512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450896/normal_60436d6f62724.pdfIn PDF document text
    • https://putoxovomugov.weebly.com/uploads/1/3/0/7/130739063/seweserasido_pedawumowifav.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/giancoli_physics_for_scientists_and_engineers_4th_edition_free.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/barefoot_in_the_park_play_script.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redilupabisaxo.rf.gd/2601450400.pdfIn PDF document text
    • http://fomepufasele.atwebpages.com/kufovag.pdfIn PDF document text
    • http://nolazukij.epizy.com/brillat_savarin_the_physiology_of_taste.pdfIn PDF document text
    • http://woxikajir.myartsonline.com/1674055536.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_off0000f722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF722 3212 bytes
SHA-256: 6b73578daef1490c1b2929d0444a811a164443739a69df5ca7509217de3ce98a
font_01_sfnt_off000102a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 5436 bytes
SHA-256: a4b42d59f8ae97da642439fa85bbf5f821ddfe21ae1fcf7df84349485e02f878
font_02_sfnt_off00011546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11546 12376 bytes
SHA-256: eeadb6f48f9f908ddc30382c51e0fcd91a61075709a07920ba4e7a77b44ef971

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