Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f83bd4178ee10bf…

MALICIOUS

PDF

109.4 KB Created: 2021-04-08 00:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 023e022a7ce07832dcce2e6f412240f6 SHA-1: 51d46c295ae45292552228841343e5a359a9ad7e SHA-256: 1f83bd4178ee10bf705059d138b2e1586619b635f3725296d07016f51bb52ade
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary one pointing to 'ponafet.ru', suggesting a redirection to a malicious site. The document body, though partially garbled, contains text related to biological energy exchange, likely a lure to disguise the malicious intent. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ponafet.ru/strik?utm_term=como+intercambian+materia+y+energia+los+seres+vivos PDF link annotation
    • https://gapuromediwav.weebly.com/uploads/1/3/0/8/130814643/853099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_606195973266b.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/filenuzeramise.pdfIn PDF document text
    • https://zabosete.weebly.com/uploads/1/3/1/1/131164473/gekubasukavev_ribobumibujaga_disitodute_kuzewe.pdfIn PDF document text
    • http://matras-24.ru/tudajifizamawodoxakabk4qjl.pdfIn PDF document text
    • http://wivupivipewezap.mygamesonline.org/chromatography_book.pdfIn PDF document text
    • http://bulibujirifubof.scienceontheweb.net/4902209120.pdfIn PDF document text
    • http://copyright-help-report.com/ropapujirqgv9a.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/materialismo_e_idealismo_filosofico.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/academic_word_family_list.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/everstart_smart_charger_codes_888.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/dokulezomolike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_60618645e3bfb.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/dasegaxebupozapuwi.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/trastornos_animicos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5fda0ae40d3f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426954/normal_6036cc5b968c4.pdfIn PDF document text
    • http://delaem-sami.online/main_tera_hero_movie_download_openloadlgorv.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/87542514149.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/zurutemavekolaki.pdfIn PDF document text
    • http://titoto.xyz/exposure_and_response_prevention_worksheet13cjv.pdfIn PDF document text
    • https://nefarixutasirov.weebly.com/uploads/1/3/1/6/131606035/kavojejem-gojijakinil-vulureb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/34210594309.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/casio_g-shock_g-9000-1v.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/piramide_alimenticia_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/17723745801.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/how_to_write_a_report_risk_assessment.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_off000169f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169F5 5324 bytes
SHA-256: 3cad13352432cda7dabfa5792ebf5f8a7beb4021a2f51372b8b210175afb63d3
font_01_sfnt_off00017c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C05 12868 bytes
SHA-256: db45bc9ad2a5c7580e10a2fbc2bf5f49963d6ad1cce6dc85856ce40554baedd2