Malicious PDF — malware analysis report

Static analysis result for SHA-256 24805ea21abc47a0…

MALICIOUS

PDF

65.9 KB Created: 2021-03-14 12:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 90ad101d923fda5048d004c9e4687b80 SHA-1: a95ed4105538c374dc495ae0df4e41b70976bb59 SHA-256: 24805ea21abc47a04ae1cd8bb267a162fd0ffbe0a9ebe36a9c0847dad41f809f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple embedded URLs, with a primary focus on 'fokemale.ru' and 'haifaiv.ru', suggesting these are used for directing users to malicious content. The document body, though heavily obfuscated, contains text related to a 'human eye worksheet answer key', which serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://fokemale.ru/wix?keyword=the+human+eye+worksheet+answer+key PDF link annotation
    • http://haifaiv.ru/wosisuret1wdon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387037/normal_5fcbd5fc3a751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451035/normal_5fdc6aa021f60.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/aS4Pnij/messenger_app_download_free_for_android_apk.pdfIn PDF document text
    • http://xasowokudat.medianewsonline.com/maxipapiburowurivikusomo.pdfIn PDF document text
    • http://vashastrahovka24.ru/54881513023fy83e.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/night_owl_dvr_change_password.pdfIn PDF document text
    • http://difozoxezepi.getenjoyment.net/metric_mania_lesson_1_length_lab_answer_key.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/30479323134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426260/normal_5fdbe691b3726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_602fe34d1a163.pdfIn PDF document text
    • http://kupiokno.su/winopezokataki4v1bl.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/ijjijpd/68517033166.pdfIn PDF document text
    • https://cdn.sqhk.co/vafizolubev/ejhyOjc/bawuwaka.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/buvupobijapaxoge.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/oBBgjNV/first_time_pregnancy_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/5Fgfmst/pinutodumizoserifed.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/forewenoxasoxobu.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/94243225097.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/15810569254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375086/normal_5fcbde881a3e1.pdfIn PDF document text
    • http://sodaapp.club/974958398712gamq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivonupawidam.atwebpages.com/banking_services_chronicle_july_2020.pdfIn PDF document text
    • http://tikeresepujel.onlinewebshop.net/diagnostic_interview_for_borderline_patients_dib_r.pdfIn PDF document text
    • http://wumafopid.onlinewebshop.net/how_to_program_my_comcast_remote_to_my_onn_tv.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/american_heart_association_bls_test_answers_2020.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_off0000c738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC738 5100 bytes
SHA-256: 299f5e907f9d389d2c018f029542ec292c45b8dbcaaa10acb7b43b4cbacfee4a
font_01_sfnt_off0000d874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD874 9988 bytes
SHA-256: d34ed9a13b357100ef8a04855073208ed9ab32b5cead47c0dda0d5fceddbb0f9

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