Malicious PDF — malware analysis report

Static analysis result for SHA-256 19766161d0d068c3…

MALICIOUS

PDF

76.2 KB Created: 2021-03-26 09:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ac2d6aff386d600136a9150d6d53702f SHA-1: a74519229add5b3329a91c6850935fa54bd3aeaa SHA-256: 19766161d0d068c3fa78bdbca2ad69a0fdf00cf4bc8e41eed1c0fe3ba4b9f52f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to suspicious domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though partially corrupted, contains text related to 'crafting and executing strategy', which is likely a lure to disguise the malicious nature of the PDF and direct users to the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://resalured.ru/strik?utm_term=crafting+and+executing+strategy+thompson+pdf PDF link annotation
    • http://present-mag.ru/bajuzadudoylifr.pdfIn PDF document text
    • http://meetchambre.xyz/fefafekonepigorekalutawojlthon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450351/normal_6019ce77007db.pdfIn PDF document text
    • http://najapizarut.22web.org/guideline_h_pylori_treatment.pdfIn PDF document text
    • http://idealica-italiaoficial.site/zogamamubodalivuyxgs9.pdfIn PDF document text
    • http://oneitstore.info/buy_weber_spirit_e-310rthpw.pdfIn PDF document text
    • http://bavomobes.22web.org/sevevisigupidawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499005/normal_604a2537dff0d.pdfIn PDF document text
    • http://punaweb.iblogger.org/35062623902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_6017368bc57a1.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
    • https://uploads.strikinglycdn.com/files/d9cb2c18-6a4b-481b-b093-ee5c3b6ee5cd/how_to_take_apart_a_4l80e_transmission.pdfIn PDF document text
    • http://pokowowusi.rf.gd/juxubunise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657a990d-5be2-46f8-ba04-15f6ed1dd660/geometry_formula_sheet_10th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ef7427-d50c-4cdc-8c3f-b5d82825192a/tavomuforejujorutog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfce4bcc-43f4-4436-be12-44ba4abe8b44/sevixatakakusemaromos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d7442c-5d02-4ebe-9897-a5ab16883700/is_evolution_a_scientific_law.pdfIn PDF document text
    • http://jonegukum.epizy.com/91061415731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0fe332d-6fb6-498a-b55b-85275ffca818/kunisotalikuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232e007f-58ed-4abe-8106-8efb71162014/19855063523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7306fd-94e2-4556-9a20-38e0bf5d04bd/sketchup_2013_free_download_with_crack_64_bit.pdfIn PDF document text
    • http://nozosikela.rf.gd/manowudesuzugubu.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_off0000dde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE5 5612 bytes
SHA-256: 7c7e0cf06529d6c95c67bc779e13aeb9d87acd929567b453b70febdb33972007
font_01_sfnt_off0000f0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E0 10692 bytes
SHA-256: 0fd9d231463983db7a3cc9e67b6f5941bc490aa5950f64ea1be61033ec122e20
font_02_sfnt_off0001153e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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