Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39722ce7fb40ae5…

MALICIOUS

PDF

82.8 KB Created: 2021-04-26 08:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 928a59d3b3192bc8a3c9e758ea4ea6c9 SHA-1: e704f35866decfc482a870213c397128d8a42b1f SHA-256: e39722ce7fb40ae567a516651a5c263616dd71b487269daaa35a032b990fd0b7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=data+representation+charts PDF link annotation
    • http://nigemutekilum.mypressonline.com/free_printable_blank_bingo_cards_for_teachers.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/48959368641.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/69816582901.pdfIn PDF document text
    • http://jarisudowapebi.sportsontheweb.net/tobarup.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/gagodenogam.pdfIn PDF document text
    • http://fajamad.mypressonline.com/42624919800.pdfIn PDF document text
    • http://shoes-storie.club/70071932265qhkjm.pdfIn PDF document text
    • http://keniworu.mywebcommunity.org/pdf_akuntansi_perpajakan.pdfIn PDF document text
    • http://buzevuzelape.mywebcommunity.org/all_integral_calculus_formulas.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/sofirosejulavarikaxovimi.pdfIn PDF document text
    • http://kushtanash.ru/do_diamonds_grow_in_valuejt2ib.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/69591214889.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/41295977916.pdfIn PDF document text
    • http://netekepipavosis.sportsontheweb.net/60973496028.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kubomefewofumim.atwebpages.com/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a5d036-eefb-47fc-a313-b6f756d5c35f/vuzesolupunuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e6e2c8-8105-4aa5-a3c7-b68741944e12/hp_officejet_7110_error_printing.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/1203677133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22d5e3d-bee2-4ed1-931b-ab519792b324/gramos_a_mg_dl.pdfIn PDF document text
    • http://vipuzala.myartsonline.com/english_literature_textbook_grade_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090dd1eb-3c01-41fb-859c-9212a60bd0e7/77184693945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d62cc7d-00a0-41be-aac5-c776b87e9dc3/63566731115.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/biomass_power_plant_download.pdfIn PDF document text
    • http://suxazetevuzo.onlinewebshop.net/53574637751.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_off000103d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D4 4988 bytes
SHA-256: 69eaaa6bca05f22c486be9a0a85f1ad86fafdb2f5edbf72d7f805b31bc83b6cb
font_01_sfnt_off000114ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CA 12556 bytes
SHA-256: 17a1fd2a216bcf4fe2546c27bfd50eef8a4efd8f0b1729a9cf08ad4d334cf50a

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