Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ebf3c0ed3e76c1…

MALICIOUS

PDF

95.4 KB Created: 2021-03-29 04:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6b2b3f6be9c084902447d60ce24570cd SHA-1: 87337ea60a40c85dd06dec89a0023da2a2057f26 SHA-256: 05ebf3c0ed3e76c139c431bf21d59fb53bba007625949e5acf9f2a014906e461
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 threat. It contains numerous embedded URLs, many pointing to disposable hosting, and one specifically lures users with a 'soundtrack mp3 download' query. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the use of a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 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://seumenha.ru/strik?utm_term=me+before+you+soundtrack+mp3+download PDF link annotation
    • http://ritual-venki.online/65599415429xls5f.pdfIn PDF document text
    • http://laserisesiseno.getenjoyment.net/differences_between_meiosis_and_mitosis.pdfIn PDF document text
    • http://pr-bux.online/weximowupurawebouwu.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/metro_2035_book_review.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/73916004093.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/40154143558.pdfIn PDF document text
    • http://bemixavojutok.iblogger.org/synaptics_windows_10_hp.pdfIn PDF document text
    • http://christmas-gift.ru/why_we_cant_wait_quotesob99a.pdfIn PDF document text
    • http://liketsven.xyz/gimumolosup7aod.pdfIn PDF document text
    • http://nalomojup.22web.org/nibarubapanemanak.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/great_gatsby_ch_7.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/lisawovemaraxaxobam.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/mogusetiwuxebobijoluweru.pdfIn PDF document text
    • http://thecabinets.xyz/business_information_technology_courses_in_canadayvqcz.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/descripcion_psicologica_de_los_personajes_cronica_de_una_muerte_anunciada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xofududegotu.epizy.com/technical_barriers_to_trade_agreement.pdfIn PDF document text
    • http://waxobutadarase.rf.gd/fukajibebumusuxazote.pdfIn PDF document text
    • http://jasigobup.epizy.com/3955546746.pdfIn PDF document text
    • http://zemodofu.epizy.com/wefitijifabatan.pdfIn PDF document text
    • http://xizokenimufewom.atwebpages.com/how_to_sue_the_court.pdfIn PDF document text
    • http://petilawunabebi.epizy.com/zomifiralija.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_bc45bb0068ca4ea6867c16ccaa07ddc7.pdf?index=trueIn PDF document text
    • http://dibulorofo.epizy.com/paxupumib.pdfIn PDF document text
    • http://vevasog.epizy.com/high_school_algebra_1_worksheets.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_b614ca5ba5c8422eb0f5b16dc4bad334.pdf?index=trueIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_81992c867b274f08b31ad94e3081935b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 5868 bytes
SHA-256: fd51e57f0632a28416ed3b94ad7c39635a17ea93d57a0cf9cff9a1d27abe2dc3
font_01_sfnt_off00012fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE6 12476 bytes
SHA-256: 331b8f6b228e3d9d25d5596f33906ea11a097f5f6f50ba6e7f68df6a1e2503d2
font_02_sfnt_off00015a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2E 16292 bytes
SHA-256: 9fe4699893b846a11db431ba8ff09f465a2698d7e79387717a7a3b0d281386c9