Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfe119b281fc4ff…

MALICIOUS

PDF

80.3 KB Created: 2021-03-22 09:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3ea34bb6015e2f9146e96ff2bbb825a3 SHA-1: 5d2b60831e391afec22010e4ecb6af3394978fa9 SHA-256: ccfe119b281fc4ff4e1ed52f46979dab257bda229724e675cdefc047781722ad
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 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=corner+liquor+cabinet+ikea PDF link annotation
    • https://cdn.sqhk.co/tuxonewebuke/FZqjahd/46226716784.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/c9jQcSi/magupipetawutejidixi.pdfIn PDF document text
    • http://fishing-rods2.club/hello_summer_go_launcher_theme0ntek.pdfIn PDF document text
    • https://lilalosemojuwo.weebly.com/uploads/1/3/0/8/130814601/d725b75.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/fgd2rL3/sotakorugobarozugaso.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/0tVhjcL/hitman_movie_2007_trailer.pdfIn PDF document text
    • https://jometuke.weebly.com/uploads/1/3/0/8/130874139/kovatatudorifu.pdfIn PDF document text
    • http://meetsol.xyz/best_stock_for_long_term_investment_in_india_2020iuw5q.pdfIn PDF document text
    • http://liketime.online/dudeveb9546g.pdfIn PDF document text
    • http://davufemalolaj.iblogger.org/gigufiferikulosobaxutabol.pdfIn PDF document text
    • http://arnautmebel.ru/calisthenicmovement_level_1hf8i8.pdfIn PDF document text
    • http://kvyovk.xyz/verajetuvejikbxfqc.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/IrgiVEA/physics_fundamentals_worksheet_parallel_circuit_problems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://muwiliwus.epizy.com/inochi_no_namae_piano_sheet_kyle_landry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95ddb25-7452-4f73-8ecc-72f65d4a955f/lujufunefafukinidiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9febb2fa-6eb6-43b9-bc05-31ee11df8fb0/epson_v370_flatbed_scanner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c624f1e8-351e-47cf-948a-e19f7ea3c8e2/fluke_1507_tester_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4096e5-9a51-4cb7-9a47-019122689d2f/6771415820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77d3346-1fa5-412c-a92c-212e0c877b01/doxukevesave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01608fd1-8502-4217-85c7-57876e4db62a/bugijuzudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5555ed3f-a0a8-4566-ab56-5c238d2f04dc/maytag_neptune_front_load_washer_not_draining_completely.pdfIn PDF document text
    • http://ruguweronum.rf.gd/48784485094.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_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 4852 bytes
SHA-256: 0803c9eac4bc231e876e48756988acba027966da19aff1a56e761f530ec54d63
font_01_sfnt_off00010215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 10368 bytes
SHA-256: dea45305ccf5a207d14f6eb1c5f38d8e78250b436fbfb3a723f383ce5e857440
font_02_sfnt_off00012561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12561 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34