Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c8d098542353e9…

MALICIOUS

PDF

186.7 KB Created: 2021-03-29 06:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 43b2a7cbd8390c4995df40d5c10353c2 SHA-1: ebee84fbef1b616e34203bd7a0800e29f0122240 SHA-256: a4c8d098542353e9a6898f72acc0d9447fc99f914574f04a1f8c4a459a8e7902
104 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'druttle.ru' suggests a phishing or malware distribution attempt. The document body contains urgency language, reinforcing the lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/award?keyword=asturias+guitar+tabs+pdf PDF link annotation
    • https://dakokegeter.weebly.com/uploads/1/3/4/7/134723120/biwigig.pdfIn PDF document text
    • https://zadobixif.weebly.com/uploads/1/3/1/4/131437920/3772244.pdfIn PDF document text
    • https://vimavopama.weebly.com/uploads/1/3/4/7/134769365/2239869.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/risotexeb-vamonakitos-wagudafeket-zuzejiwu.pdfIn PDF document text
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/gagenigakoputud.pdfIn PDF document text
    • https://xefigokilevugez.weebly.com/uploads/1/3/5/2/135299251/wovopajozajutoz.pdfIn PDF document text
    • https://dazafilitekanib.weebly.com/uploads/1/3/5/9/135977429/7927868.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/lapujasezojidular.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/RBgcnrY/adventures_of_peter_rabbit_book.pdfIn PDF document text
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/7471230.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/4tieMha/msp_2_free_online_no_sign_up.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/wunojipu/is_the_old_man_in_the_notebook_noah.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/dermestid_beetles_care_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a395c2e6-5374-477d-adf8-57e30cd5988c/50079283224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ac6749-0ae6-4f2d-88b3-60d42f11027f/metodologia_dela_investigacion_cuantitativa_santa_palella.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/contraction_worksheets_for_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/303bc41e-1029-4263-b7f1-c50d8f17c457/openpilot_cc3d_flight_controller_setup_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab09455d-6176-4189-865b-41681900bf70/22233082031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16d9508-2626-4824-9114-eab81ab7db01/blues_solo_guitar_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/replacement_blades_for_black_and_decker_jigsaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/how_to_grow_and_think_rich.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/sears_kenmore_sewing_machine_385_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/lijuguxamizuniluma.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_off0002a522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A522 5308 bytes
SHA-256: 513d56aa9bd386fd3c72f99daa39a24ce31b9807a641f64d49658f22c1fc29e3
font_01_sfnt_off0002b73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B73E 11328 bytes
SHA-256: fdc338f94aa56088b687a957a23d3bdd97821e0a71f9bb37050dca6c3280c679

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