Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6dae73876f2e67…

MALICIOUS

PDF

163.2 KB Created: 2021-05-15 17:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e6cfc1cd9bba785f7dde2d946ef014ef SHA-1: df3af5988b438c7958c5f6765df8b664725e3d55 SHA-256: ce6dae73876f2e671b4ce77becd1d4ae39e3fae1230d3ef888fbab784b3890ea
166 Risk Score

Malware Insights

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

The PDF contains invisible links that redirect to CAPTCHA-themed websites, a common lure for phishing or scam operations. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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://dafemum.ru/strik?utm_term=el+poder+del+esposa+que+ora+pdf+para+descargar PDF link annotation
    • https://cdn.sqhk.co/fujavuraleko/ONOEEig/slim_pencil_christmas_tree_decorating_ideas.pdfIn PDF document text
    • http://maturibcgj.space/vuzumavumeludokuz1hdra.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/agcQign/reporting_and_recording_accidents_at_work.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/bxARgh9/65208282964.pdfIn PDF document text
    • http://fragcups.com/are_there_two_the_shining_moviesdsuip.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/geiiGzf/cooking_madness_a_chef_s_restaurant_games_download.pdfIn PDF document text
    • http://wapajojakazewi.iblogger.org/nigavaz.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/6661756.pdfIn PDF document text
    • https://wanuwajazil.weebly.com/uploads/1/3/4/8/134899981/1684954.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://jutereli.iblogger.org/att_induced_hepatitis_latest_guidelines.pdfIn PDF document text
    • https://golewobewawir.weebly.com/uploads/1/3/4/3/134350879/fepebivemotot.pdfIn PDF document text
    • http://importants.space/467657948360dzwb.pdfIn PDF document text
    • https://cdn.sqhk.co/japewaturu/cKgibih/lipozomobuvik.pdfIn PDF document text
    • http://suvexavez.iblogger.org/xatijaletutumuwe.pdfIn PDF document text
    • https://jadetikoj.weebly.com/uploads/1/3/5/3/135350844/gezimopunoruxivajise.pdfIn PDF document text
    • https://pigiwikabulate.weebly.com/uploads/1/3/1/8/131856715/15c1b116c.pdfIn PDF document text
    • http://tryse.xyz/sabixizalisl0zym.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dafolilujoxupan.rf.gd/zanekex.pdfIn PDF document text
    • http://zisigogemewuju.epizy.com/moto_one_vision_android_version.pdfIn PDF document text
    • http://figapow.epizy.com/berkanan_messenger_android.pdfIn PDF document text
    • http://reduxaxu.epizy.com/best_wallpapers_hd_for_android.pdfIn PDF document text
    • http://peluvunuw.rf.gd/vasidelosokiweke.pdfIn PDF document text
    • http://bulasejazaw.epizy.com/rajepunolozuw.pdfIn PDF document text
    • http://ramupamotolaj.epizy.com/29564655467.pdfIn PDF document text
    • http://winovonisalupib.rf.gd/74173439901.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/no_captcha_recaptcha_wordpress_contact_form_7.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/rokenigeluloxasasul.pdfIn PDF document text
    • http://golizewojavizav.epizy.com/sulfato_de_neomicina_bacitracina_zncica_bula.pdfIn PDF document text
    • http://kufelinal.rf.gd/xagivanibat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23382 5056 bytes
SHA-256: f0ddbc25ef0afffc0cdadbe27122b0184c833cac39ac610d735bd4001726ac45
font_01_sfnt_off000244c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244C0 12844 bytes
SHA-256: 453640dc8a2def6d160db782c4e4b9f79d754f9b004c3e4e085ef378cdc62be8
font_02_sfnt_off00026db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26DB9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c