Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3e582f0c7013e8…

MALICIOUS

PDF

84.1 KB Created: 2021-05-11 03:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eab4ccd4c29657663852d155c53c2208 SHA-1: 277d067f893e719347500bc8aa4ae0133979db17 SHA-256: 2e3e582f0c7013e80ee6decca4b4d4a87fd28497794cfe958eea9e3280cd7bf1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=how+to+manually+run+sprinkler+system PDF link annotation
    • https://wewuketis.weebly.com/uploads/1/3/5/3/135327502/niwirelosiwibez_vozimuj_difutomoxana.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://criticcxck.space/tesapixojedap6s7h.pdfIn PDF document text
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/rodekavedezinik.pdfIn PDF document text
    • http://rajulikarizamu.iblogger.org/99545224359.pdfIn PDF document text
    • https://bitipares.weebly.com/uploads/1/3/1/3/131379103/3006661.pdfIn PDF document text
    • https://vesepuzimimewij.weebly.com/uploads/1/3/0/7/130776402/fijunigo.pdfIn PDF document text
    • https://cdn.sqhk.co/guzikiku/gpSOEhg/coca_cola_swot_analysis_2016.pdfIn PDF document text
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/vezivowamabipa.pdfIn PDF document text
    • http://arendagg.xyz/singer_2018_cast9b027.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/vapekexibiwuzokinada5rv2j.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/hcidljj/lateral_thinking_test_and_answers.pdfIn PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/bujifowev-sesutado-depuwidorugub-mupefalivuxe.pdfIn PDF document text
    • http://dixajarinuvaw.iblogger.org/how_to_factory_reset_wii_u_without_pin.pdfIn PDF document text
    • http://nubigawe.22web.org/business_english_reading_comprehension.pdfIn PDF document text
    • https://cdn.sqhk.co/milatepoz/hc7hdds/dragon_ball_z_mod_minecraft_1._12._2.pdfIn PDF document text
    • http://damvglaz2.xyz/48401284932aav6e.pdfIn PDF document text
    • https://gukusabijimesop.weebly.com/uploads/1/3/4/7/134761354/seromageso-wusepokidexus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_7fc32f440aa644c6984d6b1800768920.pdf?index=trueIn PDF document text
    • http://jatuxijor.epizy.com/44835348861.pdfIn PDF document text
    • http://kavezuvimibu.epizy.com/nutisubuwopotuvuw.pdfIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_40f51a4fbe3541cba1b667dc52844e86.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 5184 bytes
SHA-256: e0a65ec4f8458fe61eeaed6d7b5a9221c87a4e04822e7b59fd93922c52dbffb7
font_01_sfnt_off00010473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 10432 bytes
SHA-256: 8cc952c2aca71251d7af7f7d3e364dde41002598affaa923bb1f2b9815ccb926
font_02_sfnt_off0001282e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282E 17604 bytes
SHA-256: 3a4bd4bd3a2e815ab59d6aa7880430bada9db8ba922e0cdfe761c62383453fed