Malicious PDF — malware analysis report

Static analysis result for SHA-256 c015e01d9e6a3b2c…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 02:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: efd923f382ee027a0896031f68854236 SHA-1: ca6cdf89d6f00265767530402fd2fd81cbe4f47d SHA-256: c015e01d9e6a3b2c757a402d438871ae7daddb4c5006e18621661f01d2b3c7bf
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://xezojetit.ru/strik?utm_term=why+is+my+case+fan+not+spinning', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=why+is+my+case+fan+not+spinning PDF link annotation
    • https://cdn.sqhk.co/nuxezitowefi/CjjrgNX/ropovusujujomomexikulugo.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/die2Sjh/xomoluwusekiduwudilub.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/62873371083.pdfIn PDF document text
    • https://cdn.sqhk.co/savekedeg/ieVvMhW/13576104680.pdfIn PDF document text
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/b518e.pdfIn PDF document text
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/3c9c89b4d76.pdfIn PDF document text
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/virawefivovus.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/hariegj/crop_top_jumpers_boohoo.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/wihehep/1478644485.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/7838134.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/nie1dtK/margarita_s_cafe_freeport_ny.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/y71UgcX/dagitatar.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/jcx8gdO/funny_video_download_tik_tok_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/Ehahjhf/calibria_crystal_guardians_growth_plan_7.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/jhivig8/37482497372.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/rgjugfh/bulovapogudawowogez.pdfIn PDF document text
    • http://numulul.mygamesonline.org/jibapegalexo.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/diary_of_a_wimpy_kid_dog_days_movie_google_docs.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/VicDjew/mod_minecraft_1._15_2_pixelmon.pdfIn PDF document text
    • http://redirerer.medianewsonline.com/63413523913.pdfIn PDF document text
    • https://nubodizigo.weebly.com/uploads/1/3/5/3/135346475/ab0bf.pdfIn PDF document text
    • https://cdn.sqhk.co/xadopazo/f7jinge/item_bomb_song_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tofujuwo.onlinewebshop.net/pwm_solar_charge_controller_schematic.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/advaita_vedanta_in_kannada.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_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 5416 bytes
SHA-256: ca80d22e639c14e3033a2d531225d806c4343ddfd687e51bd9fee2f32c29dda7
font_01_sfnt_off000101e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 10668 bytes
SHA-256: 0f373e01f07ffadecb069a3c1578fff6cffb3b11c7172a98153b86a89ed9848a