Malicious PDF — malware analysis report

Static analysis result for SHA-256 4249e6105019b408…

MALICIOUS

PDF

78.2 KB Created: 2021-04-05 18:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 35293355c6f136cf4b74bc7f77cf9602 SHA-1: bd0f59217f2bf132369c64f77a159a4a6c387677 SHA-256: 4249e6105019b40864f9cd73cacacdb59d5945b2b7ee1e880dcb0ce8f92269c7
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs point to domains associated with malicious activity and disposable hosting, suggesting a phishing or SEO spam campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=comcast+remote+codes+for+motorola+cable+box+dch70 In PDF document text
    • https://cdn.sqhk.co/sewadokoka/hbCxhcL/28253887544.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/b6Hhghs/island_village_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/joxjaS7/pokemon_rumble_rush_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/hvNnFx9/ralagonolu.pdfIn PDF document text
    • https://fopisurotow.weebly.com/uploads/1/3/0/8/130874034/pigatowamizupojulife.pdfIn PDF document text
    • https://cdn.sqhk.co/gasalikuviz/jPEqmgj/73679773788.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/G1ZTieh/league_of_stickman_2_online_fighting_rpg_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/ANjbgeh/emulator_ps1_pc_windows_8.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/9821134.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/little_red_riding_hood_short_story_summary.pdfIn PDF document text
    • https://sokudepan.weebly.com/uploads/1/3/1/8/131871622/lesiratevowezumanap.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/movie_maker_online_free_download_app.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/mabas.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/hdysXUY/madrid_zombie_apk_mod.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/lugovev.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/kf4hehj/download_toca_lab_elements_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/jhu6Mzo/free_depression_chat_rooms_uk.pdfIn PDF document text
    • https://jewefero.weebly.com/uploads/1/3/1/3/131383264/9631798.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/hhdiegg/pilot_mountain_best_trails.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/jaherge/94099360807.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiderubota/jgfwAkM/fivexugemudubagunodelati.pdfIn PDF document text
    • https://dodemitewiv.weebly.com/uploads/1/3/1/3/131380707/abee46e5d5295.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/831a0516-1c51-43c5-b3e6-3d2df2c9b26c/vilominubupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5871ffbd-359e-415e-be88-a71328366f31/rorisup.pdfIn PDF document text
    • http://mozutulobiris.onlinewebshop.net/the_course_of_love_alain_de_botton_goodreads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7248db4d-fa27-4d84-9459-3d78ce1e0bec/sony_bdp_s570_netflix_setup.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_off0000f36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36F 5596 bytes
SHA-256: d59b1152cd86f46320db0f7c2cf6ea0ceb6eab93eba30e1ebcd918809829e07c
font_01_sfnt_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 10768 bytes
SHA-256: 4caeda8d203c73de935c42ee86c89b62832524249204ea16c43f2dc59cacf04f