Malicious PDF — malware analysis report

Static analysis result for SHA-256 f543ee3916f53b0f…

MALICIOUS

PDF

87.3 KB Created: 2021-03-29 23:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 977b4bd63a05f6bc9f3d7703a173783e SHA-1: a0d9eea0885515971db8dc2ecc6abe3851afcb13 SHA-256: f543ee3916f53b0f97886de0e5012bd6f3696777a6eace93797de2c32efd1f21
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm on disposable hosting, with a high ML score and ClamAV detection pointing to malicious intent. The document body, though heavily obfuscated, suggests a lure related to PDF manipulation, likely leading to a phishing or malware download site. No scripts were extracted, but the overall structure and URL analysis strongly suggest a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/award?keyword=fusionner+plusieurs+documents+pdf+sur+mac PDF link annotation
    • http://life-news.tech/cat_in_the_hat_poem_green_eggs_and_hamprrj1.pdfIn PDF document text
    • http://extrameets.fun/dorothy_perkins_size_guide_europe62j4h.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/biw_tool_design.pdfIn PDF document text
    • http://instasale.company/to_do_list_printablenz2qj.pdfIn PDF document text
    • http://thestablestl.com/25375669267qzbrs.pdfIn PDF document text
    • http://bexaxetap.22web.org/netflix_android_9._0_apk.pdfIn PDF document text
    • http://getcreditcheck.info/how_to_do_an_interview_with_social_anxietyv9dra.pdfIn PDF document text
    • http://trixy-matrix.space/pibejusuguzuzeguwegovim4hlw.pdfIn PDF document text
    • http://iwhite.space/categorias_del_materialismo_dialectico_rosentalfy7uf.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/salaam_chaus_english_speaking_book_free_download.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pewibim/ethnicity_list_for_forms_uk.pdfIn PDF document text
    • http://zekafoweratum.epizy.com/94619980809.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/what_is_the_book_daisy_miller_about.pdfIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_2e28c044774f43a484acfa0df00101ab.pdf?index=trueIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_c6ba63c309ca432295b64b2bd6c2280e.pdf?index=trueIn PDF document text
    • http://jofikuv.atwebpages.com/story_books_in_urdu_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/bupuraz.pdfIn PDF document text
    • http://nebejobibaveb.epizy.com/redundancy_policy_template_uk.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_b22f648073b4493cb96ce2858c0a3572.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 6168 bytes
SHA-256: 9f07a400e75c177e496f395344003d4a7545e118b36bf59d530d47f9bb3550f8
font_01_sfnt_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 5140 bytes
SHA-256: dd23cc14362223182f8a8a0544510ee52e70dabdb73f721489070648da9b7d0a
font_02_sfnt_off0001032a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 11944 bytes
SHA-256: 8555be1994d310d391cc4e588286d3f1ff22e56e4c7087766e5c0d46740956d9
font_03_sfnt_off00012958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12958 16460 bytes
SHA-256: 476ab2d8c1d444a517a4f789afed0008b0adaa0a71ba2a8f6807a72f2917dbae
font_04_sfnt_off00013f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F39 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e