Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aeabc0440416dc2…

MALICIOUS

PDF

79.3 KB Created: 2021-04-06 02:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3d706b62183930feeeca1c8817475ef2 SHA-1: 5467e63323cb4c6700c2ddc184cee435da003398 SHA-256: 0aeabc0440416dc244e31a5f43944699637a9b0884c5f9188f957845568b62e1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://midufefew.ru/award?keyword=cardiac+muscle+structure+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494866/normal_5ffe48636a7e2.pdfIn PDF document text
    • https://gubulugovidenu.weebly.com/uploads/1/3/1/4/131406252/zeropip_jewesazupo_nimakobof_zefetizorare.pdfIn PDF document text
    • http://xezalikunuf.22web.org/complete_ielts_bands_5_6._5_student_s_book.pdfIn PDF document text
    • https://razamilijukiw.weebly.com/uploads/1/3/4/8/134879964/zagimawamekuza_zokagotagiweson_wevekanotel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fdd859dd3ee9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fd3591bd1877.pdfIn PDF document text
    • http://wikexulefusopa.iblogger.org/rabopibisipijire.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/9968893.pdfIn PDF document text
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/memijuzofanit_novegob_vojudobomozaviv.pdfIn PDF document text
    • http://pikogoxo.iblogger.org/multiplying_dividing_rational_numbers_worksheet.pdfIn PDF document text
    • http://pebimubegema.22web.org/89872213126.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/pupaladowepamejenuxo.pdfIn PDF document text
    • http://votamomitep.22web.org/cerfa_formation_professionnelle_continue_2017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kanulojijuk.rf.gd/autocad_crack_2010_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/chapter_7_chemistry_test_answers.pdfIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_caf46dce4d424f368cacb703cb52eacf.pdf?index=trueIn PDF document text
    • http://lejajalosifoler.epizy.com/20260833793.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/26900156496.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/xulisapelud.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/netflix_logo_animation_after_effects_template.pdfIn PDF document text
    • http://xudurimujekib.rf.gd/adverbs_exercises_for_class_5.pdfIn PDF document text
    • http://zapujeromaralim.epizy.com/lonely_planet_georgia_download.pdfIn PDF document text
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_740e16f913524b3688c0ff6b22e3f0e2.pdf?index=trueIn PDF document text
    • http://gasigigi.rf.gd/88168058665.pdfIn PDF document text
    • https://677e6977-fc43-48b2-ac81-16e478c8573b.filesusr.com/ugd/3750c2_47f46680d81a4f2b9c6b247b815a3fcb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/postman_for_chrome.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B5 5208 bytes
SHA-256: 3d27d4f7db10a39745360aa3ee74ca9299a6f5590bbe3639cd4d8e8766df9393
font_01_sfnt_off00010952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 11268 bytes
SHA-256: 8241920ebe54df102c9a3bda7c7540ed662c84baee0aa5e2c2d7557ed9ffcbb5