Malicious PDF — malware analysis report

Static analysis result for SHA-256 b919061c7c039343…

MALICIOUS

PDF

77.6 KB Created: 2021-04-07 05:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: be4cd60dd2c94e9c8f473d183c1bd720 SHA-1: 79ea4241f2874b90dcd150d9406b30ba2e2f67e8 SHA-256: b919061c7c039343100d02670496ef1a5991274b06e522f8473dd4cbf92867a3
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing. While no scripts were extracted, the PDF structure and embedded URIs are indicative of a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=how+to+describe+the+shape+of+a+graph PDF link annotation
    • http://toworugesolur.getenjoyment.net/48494974061.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/jakevar-pekusexuzibuso-gutudu-nilete.pdfIn PDF document text
    • http://mnclassis.org/cajamar_app_android9a3f1.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/peniwika.pdfIn PDF document text
    • http://wexakevo.22web.org/what_are_trigger_words_in_communication.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/tjeWbhc/tickets_radar_concerts_sports_theater_festival_2020.pdfIn PDF document text
    • http://potuduwatolebu.mywebcommunity.org/34969903853.pdfIn PDF document text
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/5176597.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifenax/75iiy52/neon_hookah_bar.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/afterburn_effect_exercises.pdfIn PDF document text
    • https://mewotevavaxaviz.weebly.com/uploads/1/3/1/0/131070751/105a873465.pdfIn PDF document text
    • http://instapriz365.site/90399537220k24zq.pdfIn PDF document text
    • http://suvonenexazu.mywebcommunity.org/carolina_wings_menu.pdfIn PDF document text
    • http://vavexefane.mypressonline.com/eichmann_in_jerusalem_free_download.pdfIn PDF document text
    • http://magewedidi.iblogger.org/21883584735.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/d000a97643e95.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/732cfb303e7d01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujapoguxesak.myartsonline.com/81957939267.pdfIn PDF document text
    • http://xasibaj.epizy.com/bestand_kleiner_maken_mac.pdfIn PDF document text
    • http://kipenul.epizy.com/munijekotel.pdfIn PDF document text
    • http://sovogezo.atwebpages.com/brge_mietvertrag.pdfIn PDF document text
    • http://magegefopo.atwebpages.com/lasipugalofizug.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/position_of_adverbs_and_adverbial_phrases_exercises.pdfIn PDF document text
    • http://tuxesoguzegisox.epizy.com/fipilujezegavafu.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_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 5576 bytes
SHA-256: f546b03c210efbe022773724fed216834254fd0cbc5f4ecd4722d15ea125b76b
font_01_sfnt_off000102d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 11428 bytes
SHA-256: 01245d632376af12f0fc7d2b380b2b2a01a97bbea1c89436035862d224e712e8

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