Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fcde6541d8d80f6…

MALICIOUS

PDF

65.8 KB Created: 2021-02-26 09:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 51e434b7cdfdd4866a52ed374bc52844 SHA-1: e4d02fb799553669860ba24227b60a995bca1d2d SHA-256: 4fcde6541d8d80f6b8196fec6941bc408ed8dd835275a3f5a17a5b04ed1500ac
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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://crophysi.ru/wix?keyword=oblivion+jennifer+armentrout+pdf+download In PDF document text
    • https://cdn.sqhk.co/ritafase/geghggr/18554647371.pdfIn PDF document text
    • http://wanikagupefurav.22web.org/how_to_set_an_intermatic_timer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371244/normal_5fdf35cf7c517.pdfIn PDF document text
    • https://cdn.sqhk.co/loziromegon/j3jdibH/claw_machine_arcade_toronto.pdfIn PDF document text
    • https://cdn.sqhk.co/wupetutigo/cQ7Ifoc/thrifty_car_rental_las_vegas_airport_address.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387932/normal_5ff151ff6b4e7.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/yiejjW9/35909467387.pdfIn PDF document text
    • http://lekezoreg.22web.org/57831323536.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/how_to_hard_reset_amazon_kindle_fire_7.pdfIn PDF document text
    • https://cdn.sqhk.co/bikawegaj/9i9jeie/microsoft_authenticator_iphone_qr_code.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/KieAjjx/dwight_yoakam_movies_logan_lucky.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/7ijieig/golden_boot_race_2020_psl.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/33931716096.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipewonapifaguf.epizy.com/easy_vegetarian_dinner_party_starters.pdfIn PDF document text
    • http://jidumefimu.rf.gd/materiales_dentales_ricardo_luis_macchi_gratis.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_off0000c5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AD 5404 bytes
SHA-256: f1a0d37b523ac8ad54d3182262595377d618d4d62d0b69a4ff10e541d4c0e803
font_01_sfnt_off0000d80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80A 10024 bytes
SHA-256: 906f18a34e480ef3f624f6586cb3414e8946042314100cbe815755e62b90b02c

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