Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30cb6fb8d03ecfd…

MALICIOUS

PDF

87.3 KB Created: 2021-03-22 00:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d5894e8d22e38d7ec133662c909135ba SHA-1: 96a55d63e7f1a8d639a58738dfc01781689e6969 SHA-256: d30cb6fb8d03ecfdd04cc7a8376621fd000c63223d78577f07e060ad6c46a918
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/strik?utm_term=jesus+calling+december+28+midlands PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378157/normal_602142986d221.pdfIn PDF document text
    • https://cdn.sqhk.co/fepewujufa/VyhasMC/color_roll_3d_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/jRVjbd6/movie_maker_windows_10.pdfIn PDF document text
    • http://vuvuga.xyz/76828716362qbx28.pdfIn PDF document text
    • https://patosalar.weebly.com/uploads/1/3/1/3/131384166/18a676f90e6bd94.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/zivozumifokimo.pdfIn PDF document text
    • http://amandeepsadyora.com/how_to_turn_on_spa_heater_pentair_easy_touchux8gq.pdfIn PDF document text
    • http://khanapoorti.com/3630527648eutqm.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/IZoMgiZ/libro_biocentrismo_di_robert_lanza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_603f8e788daf0.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/hbhjibF/95806166044.pdfIn PDF document text
    • http://fbdirect.site/the_exorcist_2000_download_filmyzillaq72j2.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/cOibijK/inside_out_cast_2011.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/DuThcgc/dewozuf.pdfIn PDF document text
    • http://static-start.top/tigudifokumanarosifezutaw0dwr.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/gZicmSW/dupagovodaxurafamajorov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449776/normal_5fda8e38a8b05.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/624f0d2e-d1ae-42df-87bf-c96124948dc9/nuzavamor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b83e7b-85be-4ad4-a8b9-58316680be0a/history_alive_the_ancient_world_chapter_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f03cbf-92f2-4b26-856e-703137cab1a4/18812680737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01fdb011-765f-4e24-9de7-a259c90e2d85/nifovexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f692db58-969f-4764-9de5-540994d8e04a/54762705976.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_off0001026b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 5712 bytes
SHA-256: b49f30908d209a356eb30121fe4d5ad6b3ae7b6b57c81e05268690732b323ce4
font_01_sfnt_off000115be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BE 10632 bytes
SHA-256: 407c7f438b662a9ac665e8fe54956b1ba535a12ceb7ac36fc7262239c23a3175
font_02_sfnt_off00013a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6A 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e