Malicious PDF — malware analysis report

Static analysis result for SHA-256 827607bf34bdfd60…

MALICIOUS

PDF

84.3 KB Created: 2021-03-23 23:53:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 12940ccac771843b36905b06e0b1ea2b SHA-1: 25b2e9850ab565e7f4bc3035695a744476be9199 SHA-256: 827607bf34bdfd605b6738986c02ad474eec8d42d0c1341b68e583297b93fb9f
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL appearing to be a redirector disguised as a search result. The document body, though heavily obfuscated, contains text related to the embedded URL, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of multiple external links indicates a likely attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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=where+can+i+donate+soft+toys PDF link annotation
    • https://cdn.sqhk.co/girewobo/JijjfuY/kimepomodolorikefitevaf.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/oV3HNoB/el_ambito_de_la_filosofia_practica.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/convert_html_to_react.pdfIn PDF document text
    • http://japadeja.22web.org/20091593296.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/what_does_narrative_elements_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/jaCjjE2/comic_app_for_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/ijgjd1E/nikawopute.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/vCsSgjO/maryland_live_price_is_right.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/tgcjeVR/speaking_assessment_rubric.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/iKiaPig/how_to_score_ticket_to_ride_new_york.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/LDaDjjA/flybold_slackline_accessories.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/oa5EiiW/21670064665.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/jjcgf4u/84220101385.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/gdxjbzz/teamfight_tactics_league_of_legends_strategy_game_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jbiiicc/mujogosutumiwonet.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/free_printable_venn_diagram_template_with_lines.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/80090958284.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://ruwevabebivis.epizy.com/44750022585.pdfIn PDF document text
    • http://ruzofugeru.myartsonline.com/biocentrismo_robert_lanza.pdfIn PDF document text
    • http://bituxezemas.epizy.com/sutiwodedejubipofov.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/traxxas_summit_brushless_1_10.pdfIn PDF document text
    • http://tovujifemiga.rf.gd/why_does_my_epson_printer_keep_printing_blank_pages.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/42894847159.pdfIn PDF document text
    • http://wazododasexixak.rf.gd/busbar_design_calculation.pdfIn PDF document text
    • http://koriwironawuva.myartsonline.com/what_size_are_bar_pool_tables.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/65226320505.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_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 4980 bytes
SHA-256: 3cf936b331144db4c3df9f6c5d7b4c3141651375880ab17101db65fc6c3f125b
font_01_sfnt_off000112a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A3 10232 bytes
SHA-256: fcea424db7e5dce15cb0e61e369a0151358ecec01d4dcc573350dc86179abdaa
font_02_sfnt_off000135b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3