Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c28e449da9d70da…

MALICIOUS

PDF

74.2 KB Created: 2021-06-06 10:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 05f2df52030bd87d63bd2f43cfd0e8de SHA-1: 21510d9e79f73a977f0b8a6070bcd0ad6bceb75f SHA-256: 5c28e449da9d70da81bc9b239a41b0cb5ee9d34eb2856c4c34e8daf8a0532e06
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL suggesting a lure related to checking for legal warrants. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, further supporting a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://drafthe.ru/pbw?utm_term=how+can+i+check+if+i+have+a+warrant+in+bexar+county PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajafad.pbworks.com/f/wilowakasadur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3809e150-f29b-4de3-b4cd-210bb7ceba37/26562982388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19744468-7892-49ab-a934-6cafaf2609bc/elkay_water_fountain_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd199c21-19d6-45f6-ad6b-a7386690179c/tovejumewilomojewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e008a45f-e36a-4e93-85a4-bb2a6eccdb58/26594525614.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/f/nulubofusigukusevofivija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d91aed-fb20-4583-88ca-7d14f90666c0/arthas_rise_of_the_lich_king_epub_download.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/fovosikubeguwewaduvag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f638fdc3-521b-4aea-83c9-ec2bcaca967a/vusukeruke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9d88a0-6245-4227-a150-cf4dc81e674b/questes_de_concordncia_verbal_e_nominal_concurso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f42ed2-0cf4-4278-91f6-3500ef636412/mefuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b45c3c6-4749-4b83-b046-753c7c8d3bde/kiravu.pdfIn PDF document text
    • http://mutoteja.pbworks.com/f/flight_pilot_simulator_3d_mod_apk_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4a5736-78c3-418d-ad85-cd49a07de37e/ha_ho_gayi_galti_mujhse_song_download_djjohal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af5129d-4576-4de9-8fa8-d1e4bc71f764/how_to_turn_on_x_core_sprinkler_system.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144498159/9849761507.pdfIn PDF document text
    • http://wuwolufit.pbworks.com/w/file/fetch/144544623/samsung_galaxy_tablet_10.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e90e7ab-af6f-440c-a859-2666e943a1fe/jasaselovagutajo.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/w/file/fetch/144562347/public_policy_lecture_notes.pdfIn PDF document text
    • http://sakulibur.pbworks.com/w/file/fetch/144695841/chura_liya_hai_tumne_dj_remix_mp3_download.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_off0000e660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE660 5244 bytes
SHA-256: c05ab7f8041513d2b3532fe592c264610804143f3d67953bdf669cde82ac2a32
font_01_sfnt_off0000f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 10760 bytes
SHA-256: febbd6c2fa4d142184208eb596e87ecb5dc1c9d491b02aa6022e5db2d6453e90

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