Malicious PDF — malware analysis report

Static analysis result for SHA-256 94206a1c7f149170…

MALICIOUS

PDF

81.1 KB Created: 2021-03-29 01:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 87cf57ef5a83e46840cc8dc636ff07a0 SHA-1: da6a636074d570c11f2c8f3f6758d37ebc01ac5f SHA-256: 94206a1c7f1491702e6cc39013bab94c76cc8f2b5a0e4a8bb8a3860043d410c7
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URIs pointing to various websites, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the non-clustered link farm nature of the PDF on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=preven%25C3%25A7%25C3%25A3o+de+riscos+ambientais+pdf PDF link annotation
    • https://linoraza.weebly.com/uploads/1/3/1/4/131437671/jebinonidinozi_jasupejepimiseb_nejorubu_zasemotazutizad.pdfIn PDF document text
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/zadudonojijavuduxazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461780/normal_603db3847cc76.pdfIn PDF document text
    • http://piriveva.scienceontheweb.net/62086013849.pdfIn PDF document text
    • http://jijipefifi.iblogger.org/dell_e6410_specs_i7.pdfIn PDF document text
    • http://larebalin.mypressonline.com/natekorilakolajigo.pdfIn PDF document text
    • https://cdn.sqhk.co/tesadubozino/deYHyM0/smash_it_sports_tracking.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_6028658a89fb3.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/jDhf7je/tutorial_calibre_convertir_a_epub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495034/normal_5ffcb7ed8250c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_605558f78b9e0.pdfIn PDF document text
    • https://fotewusobowo.weebly.com/uploads/1/3/5/3/135339642/sedugo-zemexerot-jubiger.pdfIn PDF document text
    • http://vefejukexasiku.iblogger.org/wudurutugewajewikakagor.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/gfsifjb/toveluzalozedodazome.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kafupepizaji.epizy.com/pugituj.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/xokedisal.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/emergency_contact_list_for_work_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/definicion_entre_quimica_organica_e_inorganica.pdfIn PDF document text
    • http://givoresop.epizy.com/aprendizaje_cooperativo.pdfIn PDF document text
    • http://kejufunekopal.epizy.com/can_you_get_chrome_extensions_on_android.pdfIn PDF document text
    • http://zedebegeku.myartsonline.com/absenteeism_project.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_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 5972 bytes
SHA-256: 189821623ac49d692bffcfd3ff767d9289a425896ba74b461994213e08868ad5
font_01_sfnt_off00010de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE9 13272 bytes
SHA-256: 61cee8f1d3c1a02985e97329118db8170ef5566397a12faccd1b1f8357d4953e

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