Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af89b1d6bdd94e9…

MALICIOUS

PDF

81.9 KB Created: 2021-04-16 01:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9d9ed439f2d1d45f5a59cf525c35aff6 SHA-1: 26d0227485fbcd9eab39b273a0310347cca62db1 SHA-256: 3af89b1d6bdd94e99ec1059e31acc758185f20823fb0dd82b6cdb0a29e57a654
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search query, likely intended to trick the user into visiting a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/strik?utm_term=what+is+the+definition+of+prose+in+english+literature PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389084/normal_5ff5cf934a4f3.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/lanoxana.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/senibani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427538/normal_5fe0870328873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gopivikanofo.rf.gd/introductory_agronomy_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/does_walmart_still_do_photo_printing.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/editable_bingo_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/46120885875.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/12673548963.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/what_is_12_and_12_in_aa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988039c3-d1a3-4f0b-a083-23d80ca0a2f2/where_is_mastoid_process_located.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbe609b-edc9-4f4a-ae10-b2c2e3ed5f22/47848168257.pdfIn PDF document text
    • http://kewumexor.epizy.com/56509413229.pdfIn PDF document text
    • http://damowepoko.myartsonline.com/definition_of_orthography.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/livre_guide_du_dessinateur_industriel.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/xuxigurebiz.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/49233842780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d0e0a7-f588-48a4-ab66-de79723b53db/sirijaxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/jovilatit.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/good_basketball_plays_for_high_school.pdfIn PDF document text
    • http://bodudenijijeb.onlinewebshop.net/bifetawejowijizojoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2b562f-6481-4948-bd4a-8cf7bc4aa005/individual_development_plan_examples_for_business_analyst.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c61d6ed-342a-4a99-b1ad-580826b40cfc/how_many_hours_is_the_osha_500_class.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_off000103bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BD 5316 bytes
SHA-256: bb7070eba828f674a20b20211b90fff7e4c78f08d1e7eecf8dbb98d9880777a4
font_01_sfnt_off000115dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DD 10572 bytes
SHA-256: 06d1d6e566cb2b80129f4c70b1075a8c026cecdd414eb379a07ba4772c209d55

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