Malicious PDF — malware analysis report

Static analysis result for SHA-256 9525c099e533a371…

MALICIOUS

PDF

75.5 KB Created: 2021-04-22 16:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5edc42280fcf705cfc75065dca5a4dc7 SHA-1: 4923df7ae4db4b61ef1f902881cb0bc16c491c3a SHA-256: 9525c099e533a371c4e66786ca408c9aebff829c97a2328e6fc778ee87490ca2
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains a lure related to a 'Garmin vivofit 3 low battery' and an embedded URI pointing to 'bologen.ru'. This suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=garmin+vivofit+3+low+battery PDF link annotation
    • https://cdn.sqhk.co/vuluzazogur/HMjfjd1/44653497510.pdfIn PDF document text
    • http://prizinsta.info/formal_languages_and_automata_theory_bookhod5o.pdfIn PDF document text
    • https://cdn.sqhk.co/mipijotom/gjxgjih/picsart_wallpaper_hd_photos.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/hHhgpnn/35533104016.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/ifgfhFD/party_city_costumes_for_men.pdfIn PDF document text
    • http://mkr-olimp.info/towetixefus88xx3.pdfIn PDF document text
    • http://levantemosaic.com/woxewukorigilefewapenuuxx1m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1576e71-0526-46a3-8083-795d616a522f/learn_hindi_in_30_days_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e13fd0-b985-45e3-be00-6b6156c36d77/jumumifarogizos.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/technical_communication_15th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89657c23-aac2-4153-8c0b-7c6165ffea85/air_standard_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e51d0e-44c6-4696-9f6b-f84b52200eac/modernist_cuisine_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/polaris_rzr_graphics_template.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/60636777074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/243a99d0-f30c-4799-9ed3-c91a8e955a37/wutiwilupanide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48188a38-838a-407b-9a36-90208e0533dd/are_there_any_bonuses_for_joining_the_army_reserves.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/52343680682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46aadce-da2e-4921-be1e-34ed4191e013/rupapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543121e5-83b8-416f-a631-7396d38ef1f3/what_is_level_5_leadership.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/what_is_canvassing_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/vals_de_amelie_partitura_piano_gratis.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_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 5324 bytes
SHA-256: af2e5c1b222d91a6db81e36201e512e2a9e1e4b6193ea2646b500153254b392d
font_01_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 10772 bytes
SHA-256: b4a23ef7827be4a751af8bb0f5aa0a6321d6163c97a27e19c3d3300dfc9b7c6a

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