Malicious PDF — malware analysis report

Static analysis result for SHA-256 16029c10d9eba97c…

MALICIOUS

PDF

91.8 KB Created: 2021-02-28 06:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 621ea6db1b15a08cb3f1f7d3b2fb5be9 SHA-1: 2b2398e60857ddd8fa33581a92588387621de494 SHA-256: 16029c10d9eba97c4e9cdd6109cc98a271cea1d89d6c7c990ddb6d4bbb6adc81
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, some pointing to disposable hosting and acting as link farms, suggests a phishing or malware distribution scheme. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into downloading a payload.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/strik?utm_term=super+mario+land+2+dx+gameboy+color PDF link annotation
    • http://generatorsale.ru/22496882114b23uw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487665/normal_6017be47da9b5.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/dugekafaxel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466154/normal_602f1381044ae.pdfIn PDF document text
    • http://yarrebitteh.online/war_of_kings_europe_lyrics7kwu2.pdfIn PDF document text
    • http://wegansit.space/kenmore_elite_he4t_washer_drain_pump_filterj6obf.pdfIn PDF document text
    • http://wdd13.ru/nukosafinijilkr3x8.pdfIn PDF document text
    • http://get3creditscores.info/calendar_app_for_android_and_windowsmf4kx.pdfIn PDF document text
    • http://mkuu.club/leather_bag_pattern_free_download2ioup.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/9iiqihP/17284172342.pdfIn PDF document text
    • https://cdn.sqhk.co/rolizemixij/Kpw0id6/water_pipes_vibrating_noise.pdfIn PDF document text
    • http://prizinsta.online/vabosemanulufelirase4n2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500200/normal_5fc6b8608723a.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/big_little_lies_cast_season_2_episode_7.pdfIn PDF document text
    • https://cdn.sqhk.co/rurewemanavi/NPiyhee/oxygen_levels_while_sleeping_baby.pdfIn PDF document text
    • http://tuimag.ru/morrowind_prophecies_game_of_the_year_edition6lp7i.pdfIn PDF document text
    • https://cdn.sqhk.co/mimofeto/eVdE9HP/13345184085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5fd7a6593e15f.pdfIn PDF document text
    • http://wonder-ita.space/henry_lau_movies_and_tv_showskcy7g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://samesesodore.onlinewebshop.net/the_lord_of_the_rings_the_hobbit_audiobook.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/xekem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001165b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165B 4572 bytes
SHA-256: c71f33a16a71a3c0cda366d1c215c035ab0a870bc85d777521c571a83a2cf880
font_01_sfnt_off00012669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12669 5760 bytes
SHA-256: 8c94295a39367e37fe64524f7054af228fe77ec4b278f180b13cac5e4a6f6588
font_02_sfnt_off000139f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F9 11832 bytes
SHA-256: 6af52d16c40838a25cd5113a85fb1869b8bc0f3268a1ecfaa45299f2c08a4fa6

Open this report in the interactive analyzer, or submit your own file for analysis.