Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a036587edfaf04…

MALICIOUS

PDF

77.9 KB Created: 2021-03-10 03:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3c84b433d913ccee3119c903503c7c9d SHA-1: 0bc5135a298acdb1e516dda8b9cc898b5bcf74b8 SHA-256: 63a036587edfaf049c454b701a37c4572c352b87b40960e6651e59cdbe11e169
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/award?keyword=business+model+canvas+vs+lean+canvas+pdf PDF link annotation
    • http://kufafukedexepix.mygamesonline.org/sanowozapoxoweloduxafe.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/blackmagic_intensity_pro_4k_drivers.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/nosilinorojitikosunuko.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/wivunonovef/xanifoxajajavurum.pdfIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_37d7b94a34e44bbbbed2bc62ad540788.pdf?index=trueIn PDF document text
    • http://solugivewatewa.myartsonline.com/63670916200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db82164-36b0-40cb-a999-200a5dfea9af/canon_mp190_printer_how_to_scan.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/balto_1995_movie.pdfIn PDF document text
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_7f539f242b684fbaa78cf4fd857bdb25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petubapizo/backspace_keyboard_android.pdfIn PDF document text
    • https://3c8d80e7-2998-4b53-b1db-ea2053e4eee2.filesusr.com/ugd/5c8c55_5160f609744041798f18cf2dc96dee4c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeponowon/5023487754.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_31231eb8b9c04b22a8df886f6d19e7e1.pdf?index=trueIn PDF document text
    • http://kopolug.myartsonline.com/fabuduwabuzokefokokanarag.pdfIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_c726036fdb1241c9a43a8fb80acea67e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7d3ece-9986-4073-9655-0d0a19518284/jawefa.pdfIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_be9547ef1da942b592039902534749d0.pdf?index=trueIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_afc0b103eeea4c3fb33e6b8c96ae0921.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/vidmate_video_er_for_pc_free.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_fd205d44127e44feaad3a1d87c5fb1aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/xolekebisexanuwagagipu.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_70a6ec15d304401ab3b3e3df85e3a891.pdf?index=trueIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_35f3f01046774eb190fae077c58361cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/avani_avittam_2019.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_off0000f566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 5312 bytes
SHA-256: f0f837c70705b0a2a38d410e55f6ab8371d0216c62dc99d6ed4e47ad74f12fcc
font_01_sfnt_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 10184 bytes
SHA-256: ba5528d182ceef439567295b5522beaa4d2f90680c42029a82780d3e305d6c5b

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