Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b3ab19b5923d08…

MALICIOUS

PDF

77.4 KB Created: 2021-03-06 06:28:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0643b78efc47c8960a37cb8348bf2b9e SHA-1: 58240d5371445d58095483cbdc8706a57e4e7a72 SHA-256: 61b3ab19b5923d08e3e595d2acfadda2e32338eca7f94134c00e13b0666252fe
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The embedded URL 'https://soxebez.ru/award?keyword=kung+fu+panda+4k+wallpaper' further supports the lure of a wallpaper download, likely a pretext for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://soxebez.ru/award?keyword=kung+fu+panda+4k+wallpaper PDF link annotation
    • https://cdn.sqhk.co/noxisoture/qibHfgg/speedometer_app_for_car.pdfIn PDF document text
    • https://sowikidorazeku.weebly.com/uploads/1/3/5/3/135306740/tovatulavesa_wonagerep_dozewotoleg_fufapogab.pdfIn PDF document text
    • http://djami.ru/65378268730l9td8.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/96181866931.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/f2uhjeP/sazovumupetotiregakize.pdfIn PDF document text
    • http://kolomata.ru/free_brother_printer_driver_dcp-_t500wl0qn1.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/what_is_the_use_of_logic_gates_in_computer.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/65105b37.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/jbbhgge/96011085416.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/16267679313.pdfIn PDF document text
    • https://cdn.sqhk.co/suwojixuwebi/q4ohaii/jordans_retro_5_space_jam.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/digital_manufacturing_for_dummies.pdfIn PDF document text
    • http://remontlegko.info/english_supplementary_reader_class_7_guideqpwhr.pdfIn PDF document text
    • https://jowetetezuvam.weebly.com/uploads/1/3/4/7/134717416/fetosizofiteza.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/where_is_the_reset_button_on_a_air_compressori58sh.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/52377680040.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_04f866c189e64eb8855fc42f3bf94e99.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_4e47ede643b544f8955c1f5d031f2f63.pdf?index=trueIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_53106e6fde00492ca07f52b9d51d0611.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a57cd9-d722-45bd-9304-c9d82435b7f4/the_canterville_ghost_chapter_1_short_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d91e2d9-2b7e-49d9-b83c-6061ee75c75e/coleman_lantern_case_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59aab1f2-f62e-48db-80c9-1c9d258df383/learn_arabic_java_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e9d35c-ed8f-48dd-89d2-c9274b1b00b4/61587594061.pdfIn PDF document text
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_459bcddfe0a94642a196b5e4963e6448.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_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 5244 bytes
SHA-256: 720e05419c5223fd544ae4bebb95eb8886f6e0e5b6f322a755ea406aadd6ebbd
font_01_sfnt_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 14208 bytes
SHA-256: c2f3e5919f9734134ae15d912e277f4e6c5242fc69bcd7a2684b7bffedc44101
font_02_sfnt_off000112ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CE 16164 bytes
SHA-256: f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd