Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb925f51a4fb503…

MALICIOUS

PDF

195.2 KB Created: 2021-03-14 16:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 549f5361f0a40292a9a7c4f57d346337 SHA-1: 2452218fc2a10e9864347574abccd54a2c63b9ed SHA-256: edb925f51a4fb5030d65d316abd1e2b015ae545971335758ae91c79efb90cf59
134 Risk Score

Malware Insights

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

The sample is a PDF document that functions as a link farm, hosting numerous URLs that likely lead to phishing or malware. Heuristics indicate it uses urgency lures and is flagged by ML classifiers as malicious. The presence of external URIs and the overall structure suggest an attempt to direct users to malicious content, potentially for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/wix?keyword=heartmate+ii+manual PDF link annotation
    • https://cdn.sqhk.co/nezotelo/FS1mjco/best_christian_apps_on_roku.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/sozelefaxofikes.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/62jhgi2/iced_matcha_green_tea_latte_starbucks_healthy.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/idhbjhc/language_guide_german_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/kusedesomawa/lOIjaha/wepagufefusakaxafuzin.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/allowable_stress_design_method.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/AifPgdl/39726570265.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/hjshbj6/35348519506.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/1ibSlc3/38267279256.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/iAgejeb/zepeto_backgrounds_tumblr.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/e6NGvcg/81785480110.pdfIn PDF document text
    • http://jetinaxisodew.mypressonline.com/perempuan_dalam_budaya_jawa.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/eGhfgjp/dante_s_inferno_test_questions_and_answers.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/cuanto_es_4_milimetros_en_pulgadas.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/iI7idUj/36071781665.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/eDHcqGf/xidejunudom.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/a6f04c83-c4ea-42f6-a270-e71e2b009294/vuvovufudapo.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/stanley_jump_starter_1000_instructions.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/sears_craftsman_garage_door_opener_battery_backup.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/epidemiological_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5c5d09-9ba5-4710-a4b8-13e48534f3b0/spectrum_internet_not_working_well.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/when_can_we_fly_in_shadowlands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6335e2b-23d9-4b20-83b5-341ec868b447/jomosafofelo.pdfIn PDF document text
    • http://duvodix.myartsonline.com/pujokolalegulutawisufuz.pdfIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/how_do_i_reset_my_neato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16729553-1dcb-4001-9cad-a3c43d322f18/47270228866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6b77b6-de7b-4a57-969f-4ba92485b539/how_to_relight_pilot_on_kenmore_oven.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_off0002c439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C439 4616 bytes
SHA-256: 1ab5770185686fd3a8fc8bc7586db5ffeee98e8a6ebe3a91e5606507562aa906
font_01_sfnt_off0002d3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3CB 12356 bytes
SHA-256: 5dda990b9a59fe5b0e9a30c3a4f0152cf3f2419dcd39ace33f4769725d2a39f8