Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ded051611bb4d1…

MALICIOUS

PDF

80.0 KB Created: 2021-04-28 11:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 24928fc2e6b8ae12696a393c1f805fe6 SHA-1: 212e88a26115a77a43f14c8a859546bdec7c380c SHA-256: d6ded051611bb4d17aaf7cee23ed70c4270a375b732fa0bbcfa9eb6fff06d026
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection (Pdf.Phishing.Trojan). It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Harvard classics shelf of fiction 1917' and authoring application details, suggesting a lure to disguise malicious intent. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=harvard+classics+shelf+of+fiction+1917 PDF link annotation
    • http://pasipodo.mypressonline.com/42365686412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_604ce563961b8.pdfIn PDF document text
    • http://sutobep.getenjoyment.net/70580913214.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456393/normal_5fe558bfce3dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494669/normal_60407ac93ad8f.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/fjfst9Q/tatib.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/jCiiKRt/adventure_escape_mysteries_trapmaker_chapter_2.pdfIn PDF document text
    • https://cdn.sqhk.co/bureruverog/aZij3ge/67186947407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481852/normal_5fcd986b52011.pdfIn PDF document text
    • https://cdn.sqhk.co/riteximeras/ShgXnvt/philippine_merchant_marine_academy_application_form.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/the_dead_sea_scrolls_reader.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/BUjcGja/electronic_drum_set_for_beginners.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/acorde_la_sostenido_disminuido_piano.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/defujo/craftsman_5hp_chipper_shredder_air_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/farmland_values_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/22993476850.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/januvibidutusekifujup.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/garewififi.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/pujuganemeju.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/pressure_ulcer_prevention_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/75574602899.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/community_child_care_fund_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/book_app_maker_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/ruxar.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/sesazopowijeradoderavozum.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/xipotuvases.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/bernier_distressed_font.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_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 5420 bytes
SHA-256: 43bc8f9983cb981ae67da81c9cf40c33826d1358f7dde1bdbdabcf571f7a982a
font_01_sfnt_off00010bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCB 11428 bytes
SHA-256: 1aa2543ede5c2fdd4c0df859b5736f4f95becb1edb1f8a07c9f3fc12fba53151

Open this report in the interactive analyzer, or submit your own file for analysis.