Malicious PDF — malware analysis report

Static analysis result for SHA-256 992fa979cc50c4b2…

MALICIOUS

PDF

78.6 KB Created: 2021-03-23 08:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cbc1a0455dc7d3b10ca71e306fe5f685 SHA-1: 8f64f35ffa132d2b0aca3ba817a23733830a1c2a SHA-256: 992fa979cc50c4b27732c69ce8c3a3714dce61c31ab3108d0193daba7aee3914
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=can+fasting+regenerate+the+body PDF link annotation
    • https://cdn.sqhk.co/guvevifowo/ghjfXEI/cowboy_duel_music_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/SigZieN/mokafodugonudodisejemafup.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/Zgfhbhg/muredarepexudewopu.pdfIn PDF document text
    • http://reduslim-italia.website/mimasesibodavelog30kq.pdfIn PDF document text
    • https://cdn.sqhk.co/melivetipi/ge5hiaQ/teachers_assistant_test.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/nImhgjC/htc_backup_messages_to_pc.pdfIn PDF document text
    • http://devlp.club/what_does_sxt_mean_on_a_dodge_caravanmlldh.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/92149165997.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/ggidjbg/24354572922.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/66681367502.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/68c10647-064d-4282-a224-a021414755f3/65350230165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56b0e2b1-0e18-4d64-9026-0d71ee8b9dbd/ruzogakotoxavasebuk.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_dfa03b043a6445c080a1fe2caf4844ff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/56575a24-36d0-4589-9a40-44ae60e4bb49/gujogafo.pdfIn PDF document text
    • https://0bc2ebcf-5b85-435c-8290-6c6350a165f2.filesusr.com/ugd/ee98f5_8a61e29f9d894c698db108849b657e27.pdf?index=trueIn 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_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 5188 bytes
SHA-256: 6599d95ea2263f40694a0f168dc9e28f75dda5f2d37afb50f15d95fd158a3af1
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 10736 bytes
SHA-256: 113007fabe099b12aac3de9e6f19e5ff09fbb60c6d9b8b89df4e75673ce0b6fd
font_02_sfnt_off00011f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.