Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f13290653abfea…

MALICIOUS

PDF

83.1 KB Created: 2021-06-13 20:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 74cf3caf1adb3faa2516b26cc0e75b3a SHA-1: 03f93e554939e235407982c1ce954d2f5bdaf48d SHA-256: 51f13290653abfeacbf612e5345b9bad534de595dd635f63c7ec330cd2a77dbc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, embedding numerous external URLs, some of which are associated with potentially malicious content or lead to further downloads. The primary lure appears to be related to downloading movies or software, as suggested by the document body and URL parameters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://laborke.ru/pbw?utm_term=download+punjabi+movie+chal+mera+putt PDF link annotation
    • https://gufovijer.weebly.com/uploads/1/3/5/3/135339237/6bb2a5f5403b.pdfIn PDF document text
    • https://bojuwakuxejekur.weebly.com/uploads/1/3/5/3/135347713/9661935.pdfIn PDF document text
    • https://petugaxuw.weebly.com/uploads/1/3/5/3/135397026/3064778.pdfIn PDF document text
    • https://jepusorowuw.weebly.com/uploads/1/3/4/3/134370943/3d32c29b889fa38.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/1804718.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7e13ec-ffe0-4237-9c48-afaeed422375/problemas_con_solucion_de_triangulos_rectangulos.pdfIn PDF document text
    • http://kimiwodevus.pbworks.com/w/file/fetch/145019028/top_5_hack_clients_minecraft.pdfIn PDF document text
    • http://woziralipu.pbworks.com/w/file/fetch/145166247/pokemon_go_old_version_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438b3ed6-46e2-417f-8941-5ca7ed1a47f0/saber_que_tipo_de_archivo_es_linux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56139b5-28da-4e28-9dee-4e696f661679/fichas_de_comprension_lectora_2_primaria_santillana.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144654294/24132309603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed421df-dc38-4b32-8baa-916250c4128a/14856707310.pdfIn PDF document text
    • http://tedadopite.pbworks.com/w/file/fetch/145206879/next_jojo_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b555057-7403-4565-85de-47a57ee28f87/how_to_check_apple_watch_serial_number_without_pairing.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144428010/como_dar_robux_en_roblox_a_amigos.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/145116510/gejodedagiganopekabi.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/kawasaki_kx250f_2013_service_manual.pdfIn PDF document text
    • http://ralabasom.pbworks.com/w/file/fetch/145196685/human_centipede_3_full_movie_free_online.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/f/bending_strength_ratio_drill_collars.pdfIn PDF document text
    • http://rutarotovez.pbworks.com/w/file/fetch/145101534/just_like_animals_song_mp3_download.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144517776/why_does_my_kidde_smoke_and_carbon_monoxide_alarm_keep_beeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a3d221-67fb-4369-b703-ce8130512eb9/wozoxozakesobosatip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7be700-2b42-4206-ae1a-f5b1c2426bcb/rimatagexewupotesapevorat.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46C 5504 bytes
SHA-256: bcebcdb8990c959821c4da52c97be9ccf104cd038e4ad621e9627cce69ce5733
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 11036 bytes
SHA-256: b16283794101bf45e8c563a3ee4d4eafced4fa1391fa99bd5c3ab92f228e34ed
font_02_sfnt_off00011cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEA 16092 bytes
SHA-256: d9cee66bce1a2f6884d5bafa49fe346bd0ea0c416d989e96325815417e178d5b
font_03_sfnt_off000131ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 3360 bytes
SHA-256: 8b7515d2fc49606d2d54e6fc1bcd43c8cc72f14e756dc1cdd43939b0d8809f78

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