Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be385ae26bb1b44…

MALICIOUS

PDF

100.6 KB Created: 2021-03-28 20:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 86f27b44a1296265ae699822be38daf7 SHA-1: f541a4e9423f64195b7c9618ded295a6d9170211 SHA-256: 8be385ae26bb1b44e355cca0228b87875d7f7a94b18505f6dd154c2e8622b918
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, many pointing to disposable hosting services, indicating a link farm designed to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://dugedepap.ru/wix?keyword=tristan+yugioh+abridged PDF link annotation
    • https://jareruko.weebly.com/uploads/1/3/4/3/134348829/8742672.pdfIn PDF document text
    • https://lipojiwogim.weebly.com/uploads/1/3/0/7/130776075/vimafepotewepuxojux.pdfIn PDF document text
    • https://kunuxuzuvedenax.weebly.com/uploads/1/3/6/0/136051690/7102773.pdfIn PDF document text
    • https://fiwitoritare.weebly.com/uploads/1/3/4/5/134582968/kapogoxexumidama.pdfIn PDF document text
    • http://opt15.ru/56184435512vqxww.pdfIn PDF document text
    • http://matrixbicycles.com/45725220927n0qbf.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/ZVUptic/coloured_led_taper_candles.pdfIn PDF document text
    • https://fubediko.weebly.com/uploads/1/3/1/0/131070718/kamubulunoj.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/jdji8hj/25960064081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473926/normal_60066af836af2.pdfIn PDF document text
    • http://milanomoda-italy.website/how_to_prepare_for_experienced_interviewahqzh.pdfIn PDF document text
    • http://decideyouself.fun/80288646047pcei1.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/telecharger_pokemon_emeraude_pale9te1x.pdfIn PDF document text
    • https://cdn.sqhk.co/kegimovotol/giiojeK/wafulimevodopazijilareki.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaluwozez/NiegfiS/word_bliss_all_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/sufadoma/jdwaXL7/pedovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5fe95bce4580a.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/7gifgew/wrestling_revolution_3d_wwe_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/ggxNGey/42072942566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418781/normal_6006abd64fa2f.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/lukepepe/49165433848.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/80722350816.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/information_technology_specialist_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/weather_report_in_kernersville_north_carolina.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001190d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190D 7240 bytes
SHA-256: a450eed4774202534d44c0b446656bcf3cae8214d1529c33f9855741c130a0d8
font_01_sfnt_off000131c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C4 5248 bytes
SHA-256: eb9b362e6cddf9adbc361328c4c63210a2836f8777ea7138c68cc573efd888c4
font_02_sfnt_off00014399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14399 12444 bytes
SHA-256: a62463287ee70a6857d709579a64b0ee0502dfd5207b4be0601c2bcb8221d502
font_03_sfnt_off00016db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DB1 16132 bytes
SHA-256: ca0bb856d51d4c440eb4e48db524e4b4a87bf80294704eab3ae97752e74326e1