Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fd7fa57ad56e2d…

MALICIOUS

PDF

82.2 KB Created: 2021-04-02 20:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8321b4927f11af3b22033742c713b232 SHA-1: cd55e9f6835a34ae5e09c977fdf4c9fba0cd61ee SHA-256: 54fd7fa57ad56e2ddc27f7f9dfa894eae00e9ce5ad8bfac9a08deb7c88631124
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains and configured as a link farm, strongly suggests a phishing or malware distribution campaign. The embedded URL 'https://botokaw.ru/strik?utm_term=mitrokhin+archive+1+and+2' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://botokaw.ru/strik?utm_term=mitrokhin+archive+1+and+2 PDF link annotation
    • http://beautytopshop.site/halo_fall_of_reach_download5r9ci.pdfIn PDF document text
    • http://classkaod.ru/xediwipuvilaxuzurewewirmp71x.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/revlon_fire_and_ice_perfume_price_in_india.pdfIn PDF document text
    • http://gepavozo.mygamesonline.org/of_more_than_average_height_synonym.pdfIn PDF document text
    • http://afterdealer.pro/bugisutommpomt.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/affairscloud_banking_awareness_free.pdfIn PDF document text
    • http://sallely.xyz/20695282047xhh42.pdfIn PDF document text
    • http://vabuletarikinil.iblogger.org/bed_sheets_french_translation.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/71004088197.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/80634570423.pdfIn PDF document text
    • http://migajipanijezep.22web.org/barbaric_rites_workout.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/airport_vocabulary_exercise.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/41316434965.pdfIn PDF document text
    • http://goxutasabadatum.sportsontheweb.net/diferencia_entre_derecho_ecologico_y_ambiental.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/dekuwawomit.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4535b1a-233b-4bc7-abe1-d707be7e83c5/59523216058.pdfIn PDF document text
    • http://gujimosodaza.myartsonline.com/python_language_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef00869-b6b6-4181-824c-21199895c917/39557809637.pdfIn PDF document text
    • http://dupizorof.rf.gd/fofalavonubo.pdfIn PDF document text
    • http://nilukuvowut.epizy.com/adverse_effects_of_vaccines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741e888a-7393-41b6-b7c8-8e7095eff975/regression_modeling_strategies_with_applications_to_linear_models_logistic_regression_and_survival.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/sizesegotupurefoxixa.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/25990400609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a3a00dd-425e-4068-912b-c78be2eb1551/why_is_my_humidifier_flashing_red.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_off0000fb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 1724 bytes
SHA-256: d2d65a8b04c555ff691869507fe63aecb975aafdb4ac6af5e2f016a013b6e4a3
font_01_sfnt_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 5128 bytes
SHA-256: 083cb7551d8119fb9d5675506b346a9c32816456b9e9a344ba3d88131e88212a
font_02_sfnt_off00011558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11558 11052 bytes
SHA-256: 52bfe356e623b0993e32055910cb71313753c4ee6ad200a4f31410f9f3085eae