Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc5b28c07e0add9…

MALICIOUS

PDF

74.5 KB Created: 2021-02-25 06:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6dd038d9f26b3ee38b4d21fcab77255a SHA-1: 8078d10e684f83216968d4fb9383e1a81e1244fc SHA-256: dfc5b28c07e0add992d1fe2e7950202f2f98a9ac6b4f2d6c565c757287fe352b
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://leonvi.ru/award?keyword=michigan+child+support+calculator+online PDF link annotation
    • https://cdn.sqhk.co/bizujonad/Vghjhux/vivozefufanenem.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/jc2Pmjg/black_widow_avengers_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/3mjdoXT/99532900536.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479674/normal_5ffc16cb93f2b.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxaletadi/gfhamhc/noluxop.pdfIn PDF document text
    • http://jobauthor.online/what_is_the_best_scroll_saw_to_use3mxj6.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/petition_to_settle_personal_injury_claim_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/ihN3Ejh/photo_editing_software_free_download_for_windows_10.pdfIn PDF document text
    • http://ig-supportcenter.xyz/morepejeltruz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubuvajaroxe.epizy.com/indira_gandhi_university_date_sheet.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/zixojajuwiwun.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/new_htn_guidelines_2017.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/kenmore_microwave_790.803_size.pdfIn PDF document text
    • http://gedokimisizat.rf.gd/josilizuva.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/is_it_hard_to_pledge_delta_sigma_theta.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_off0000e9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AD 5340 bytes
SHA-256: 7de811daa9a7fa1ee0edbff692328e7b548f63061006b73e4b5a81ac1908b71d
font_01_sfnt_off0000fbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD9 9768 bytes
SHA-256: 32c1e506ae3e79f83a5affdd7e419c2f0849a136556de4b7d3027057cc4418a2