Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdff54a55352ce45…

MALICIOUS

PDF

93.4 KB Created: 2021-06-12 11:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: baa2f3d31b114054516dafdaff016f69 SHA-1: ccd90e3cb5eee5f54ac5568a3584be56ad7ecdda SHA-256: cdff54a55352ce4556c9860446381b67eb0352743a9c04c20127cda1a589fe0a
194 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of 'Hypixel official discord' in the document body and a suspicious URL indicates a lure to potentially malicious content. The ML classifier and ClamAV detection strongly support its malicious nature, likely serving as a dropper or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://allytemp.ru/pbw?utm_term=hypixel+official+discord PDF link annotation
    • https://dakuxemi.weebly.com/uploads/1/3/4/8/134883968/vilokes_vefewodogagune.pdfIn PDF document text
    • https://nunifabemavi.weebly.com/uploads/1/3/4/8/134871907/6374558.pdfIn PDF document text
    • https://pifilapife.weebly.com/uploads/1/3/4/3/134376120/6346890.pdfIn PDF document text
    • https://tagorawijetix.weebly.com/uploads/1/3/5/3/135392874/talodelagis-xojavogadi.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/1577617.pdfIn PDF document text
    • https://xuvarilanagore.weebly.com/uploads/1/3/4/4/134470983/pipipa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokiboz.pbworks.com/f/best_whatsapp_dares_for_friends.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a4ff88-ec69-4525-8021-781f5943c372/tebusalokamajinujusulos.pdfIn PDF document text
    • http://kukebow.pbworks.com/w/file/fetch/145173939/91695417409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38df4add-713e-4e6c-9c8f-d93dbec5759c/numadatuzarasu.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144736791/bexedisixu.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/short_stories_with_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748af5ab-4359-4274-8376-baa7fd161228/attack_on_titan_season_3_part_2_blu_ray_limited_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b49782b-1060-4195-83d7-6c76c5267a40/how_do_i_update_my_american_megatrends_bios_windows_10.pdfIn PDF document text
    • http://nefusim.pbworks.com/w/file/fetch/144455073/how_to_make_bunk_bed_stairs_more_comfortable.pdfIn PDF document text
    • http://lifabukis.pbworks.com/w/file/fetch/145035429/gaditiwinolup.pdfIn PDF document text
    • http://lokifasowaso.pbworks.com/w/file/fetch/144874143/saurashtra_samachar_epaper_bhavnagar_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89290ed-b78a-4acd-8b07-e6f2dce99590/patton_heater_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fbd8a3-802e-4291-96cf-109f0d95e38c/platero_y_yo_resumen_corto_por_capitulos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001139f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139F 5280 bytes
SHA-256: 4970a0f90ed51b6634c5cf7c8873e47d8f67fd278d04d1a0fa63c9874e99b3a8
font_01_sfnt_off000125b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B4 13568 bytes
SHA-256: 3f77187c88d3816a67d13087ba7561dd63657ad8f5834541b4716b18d50c4d38
font_02_sfnt_off000152ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152AB 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660