Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ad590bf5c2e250…

MALICIOUS

PDF

90.3 KB Created: 2021-03-25 04:27:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 07851200d822d2f9c75d0a9aaf9254fd SHA-1: 5fd7d08c3cef5869b6fe303f14bb100ee5f8d754 SHA-256: c7ad590bf5c2e2501eeaa8f4acab15bb7a957b4381d126611ee53bbe65969bf3
126 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to 'maypoin.ru', suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://maypoin.ru/wix?keyword=reimer+music+education+philosophy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383698/normal_60490d485ef93.pdfIn PDF document text
    • http://wogizejelalod.iblogger.org/to_kill_a_mockingbird_study_guide_answers_chapter_1-3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5fc9ddfa2d4db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_60220608d0cbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489255/normal_600210a083cbf.pdfIn PDF document text
    • http://vigetatefix.iblogger.org/white_christmas_ages_of_actors.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/caedmon_s_hymn_bede.pdfIn PDF document text
    • http://buvalopexur.mygamesonline.org/buffy_coat_preparation.pdfIn PDF document text
    • http://nudevego.iblogger.org/what_were_the_3_estates_of_the_french_revolution.pdfIn PDF document text
    • http://kazerurido.iblogger.org/nololavoxab.pdfIn PDF document text
    • http://wupupetobuzune.22web.org/work_plan_template_in_excel.pdfIn PDF document text
    • http://bikokobolo.sportsontheweb.net/nyssma_level_6_piano_requirements.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/analyzing_sentences_an_introduction_to_english_syntax.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/jodabiladezot/12973502084.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/timesheet_hour_calculator.pdfIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_7c5803906e664e3180bbcab3d6721e75.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nowokil/89713011597.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/xefofodekubuvupujoxe.pdfIn PDF document text
    • http://zowolowoziru.rf.gd/yoga_poses_for_kundalini_awakening.pdfIn PDF document text
    • http://wetiruri.epizy.com/xazulupotulumafad.pdfIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_30b067408a8c40319304578ad69a77f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/easl_guidelines_hepatic_encephalopathy.pdfIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_eb26932d71cd42e5ae7a6358c732a6ec.pdf?index=trueIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_3d9add56d1e34f6283ded297a77e72ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tutasujal/tenuzojemudez.pdfIn PDF document text
    • http://pelewonaxiguso.epizy.com/sample_excel_spreadsheet_for_expenses.pdfIn PDF document text
    • http://xopemaw.rf.gd/7440983892.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_off000125dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DD 5424 bytes
SHA-256: edb222d653fe4966ec3ed0de41b7f4f344146340523a5b3045b50330382d9098
font_01_sfnt_off0001382f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382F 10200 bytes
SHA-256: 95a320b5b5f97393cd07a1555a41bfdf1f8bd17d3ee949ff85a7608dd2cd23f3

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