Malicious PDF — malware analysis report

Static analysis result for SHA-256 314c68d5a65d5da8…

MALICIOUS

PDF

83.8 KB Created: 2021-03-12 04:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 49bf819d4f87805b3651f4663a912e54 SHA-1: f68cf87cf97e3dd7756cddd3713f0dfd3d893eef SHA-256: 314c68d5a65d5da813f6e47c3687e1bf94383b9810b6e30ee7b76da1e43c051f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=how+good+are+ozone+bikes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493917/normal_5ff584926deb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_60437070ad041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_60185c6dc4ba5.pdfIn PDF document text
    • https://cdn.sqhk.co/mefivujosawo/CMgcGeo/bike_jump_game_app_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fe3b7d0be695.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/4YF7gcT/39356007080.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/dTfP5Gf/mp3_ringtone_cutter_download_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_601f8275c8481.pdfIn PDF document text
    • http://store50off.info/2975995614822h9o.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/h1lMlRK/40974609088.pdfIn PDF document text
    • http://torevifij.iblogger.org/84989631882.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/40512758531.pdfIn PDF document text
    • http://ulekschool.online/ludariweromulg7p2l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5fe8d80b287e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_60344468555c8.pdfIn PDF document text
    • http://badodamibevije.iblogger.org/bse_odisha_8th_class_book.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/berlin_subway_map_english.pdfIn PDF document text
    • http://zoom-omsk.ru/fibitodikagopagitqlo11.pdfIn PDF document text
    • http://bojikewexojok.iblogger.org/why_is_my_dyson_fan_not_cold.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/pelabomunizumefedugo.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/free_chronological_resume_template.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_off000108b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B6 5268 bytes
SHA-256: 32812967a8e5a2bff90f42bbaca8a1c13a8c9dbc2ba019d2f4de112a0d50eaf3
font_01_sfnt_off00011ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC8 11924 bytes
SHA-256: 6aea39c99674ebdadb1674d50b981fdf80909a4b06d4042046e89c8f22f36602

Open this report in the interactive analyzer, or submit your own file for analysis.