Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1979995e63b241…

MALICIOUS

PDF

75.8 KB Created: 2021-03-08 00:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 004e0da4cecb303f2a1f387db65946f1 SHA-1: 9a297f44ea7ba89e102bbe60b898f0d7928a8e8b SHA-256: 4f1979995e63b24134d9cf8f0ed75905f0fddb45568a4085845037077aec1c25
154 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm on disposable hosting, potentially serving as a lure for phishing or malware distribution. The embedded URL and the document's superficial content suggest an attempt to trick users into visiting a malicious site. While no scripts were directly extracted, the PDF structure and external URL firings strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://mezovuduw.ru/wb?keyword=dbt%20therapy%20training%20nyc PDF link annotation
    • http://blognews.top/341267430450e5xw.pdfIn PDF document text
    • http://richmaya.site/zadakojujalemexlbh.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/vapixuwitifak.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/what_is_the_best_shop_vac_brand.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/xebuben.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/how_to_name_your_best_friend_on_snapchat.pdfIn PDF document text
    • http://xupenirulavep.iblogger.org/oracle_ebs_forms_personalization.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/aci_318-14_minimum_shear_reinforcement.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/sajinigepemoxidu.pdfIn PDF document text
    • http://limelusefi.iblogger.org/zewopepatupigibidorivurel.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/jedoxujiguvufinosubefa.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/ar_15_upper_with_carry_handle.pdfIn PDF document text
    • http://tapadobav.iblogger.org/boboiboy_drawing_apk.pdfIn PDF document text
    • http://wspring.space/tufatasilalf8s55.pdfIn PDF document text
    • http://zaranes.getenjoyment.net/30580024625.pdfIn PDF document text
    • http://crispyset.online/duwubikul06f0.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/do_you_capitalize_than_in_a_title.pdfIn PDF document text
    • http://malanefire.sportsontheweb.net/whirlpool_thin_twin_take_apart.pdfIn PDF document text
    • http://vaxuditinu.iblogger.org/36116083333.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mulubixuzu.epizy.com/jupaluri.pdfIn PDF document text
    • http://megozesupulop.rf.gd/billi_billi_akh_song_punjabi.pdfIn PDF document text
    • http://ferodokibaw.epizy.com/88994301920.pdfIn PDF document text
    • http://dijuvunote.onlinewebshop.net/they_say_i_say_chapter_4_exercise_1.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_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 5228 bytes
SHA-256: c70c68ae616cd0d168d685affb4aeb9a30a73fa67c663b65a3a05b1df1566431
font_01_sfnt_off0000faed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAED 11020 bytes
SHA-256: 1181502672c9c04526b2bcdafb38b72f9ed94bcab93c49dfd52978c9f1fdf853