Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e00da751d483f8…

MALICIOUS

PDF

69.2 KB Created: 2021-04-01 03:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b2499ac51804c3aebb4721e11855ea2f SHA-1: 10866b37ff81b97a56f3f5acd8852b1b3e987629 SHA-256: 86e00da751d483f82d9a37ed3d2b0b68b117100dca4e357e02a3a76d3a5a360c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dugedepap.ru/strik?utm_term=how+to+truly+stop+smoking PDF link annotation
    • https://ludunijup.weebly.com/uploads/1/3/0/9/130968942/melenonugi.pdfIn PDF document text
    • https://vefutafefu.weebly.com/uploads/1/3/4/8/134882527/9454935.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/concurrency_is_not_parallelism.pdfIn PDF document text
    • https://soseriwu.weebly.com/uploads/1/3/4/8/134898980/74ea21d4c6.pdfIn PDF document text
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/xarobabugusil.pdfIn PDF document text
    • http://ruwulepukapuk.iblogger.org/fefokupez.pdfIn PDF document text
    • https://tovejuzu.weebly.com/uploads/1/3/5/3/135398771/4250001.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/nuxulikiwab/4395507268.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/bajrang_bali_dj_song_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/favogapa.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/aparichit_2_full_movie_mp4.pdfIn PDF document text
    • http://waxaravibew.epizy.com/roromabinogulunineto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/536416bd-7670-4af1-947e-06be45975b82/vagakuwubede.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/tipos_de_corrosion_en_estructuras_metalicas.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/creation_crossword_puzzle_answers.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/10116947415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9466592e-bf6e-444b-bfb4-4da6aa9731ff/eventide_timefactor_looper_midi_sync.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6e402f-70c7-4b44-bac3-026d4b91a28d/94019238205.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/air_force_academy_sat_code.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_off0000d090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD090 5148 bytes
SHA-256: 48a3d82487f5c3d47daf4a80da78a854a084e2e4ef9e97f7a14841e56a2ba06b
font_01_sfnt_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 11152 bytes
SHA-256: 309ea67f3ecc86cbd8df2b083b300c0716b07b5e30e060e41d0d5e03bfe2a9e1

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