Malicious PDF — malware analysis report

Static analysis result for SHA-256 94953cbc879c811e…

MALICIOUS

PDF

102.8 KB Created: 2021-02-23 02:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 59c01e3c202e6464499d489469587c28 SHA-1: bd0af1b71c39c0134ec781fcf1a5aaec672fd3c1 SHA-256: 94953cbc879c811e867b5d6013c36e1c0dfe7a291a2c0e9f9b1a01404182d327
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://bologen.ru/strik?utm_term=flysky+gt3c+binden PDF link annotation
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/nuzesadalavet.pdfIn PDF document text
    • https://cdn.sqhk.co/xobitabab/VKijII9/my_success_story_business_game_hacked_apk.pdfIn PDF document text
    • http://ridunculus.com/93072868858zwbce.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/hhjhgeJ/mituzopogefiwurimi.pdfIn PDF document text
    • http://sodalabs.club/19119704042hv2qo.pdfIn PDF document text
    • https://cdn.sqhk.co/tijovomiv/jNrXrgh/1858817810.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/hMwroid/35513337305.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/mwVjhjg/texafokidekajumolaru.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/NhaxjaH/50894902800.pdfIn PDF document text
    • https://petivevidimow.weebly.com/uploads/1/3/0/8/130813859/jejow-vimip-pajejamagum-zebajarojated.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/4e8371943a.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/A7icujc/home_design_3d_gold.pdfIn PDF document text
    • https://cdn.sqhk.co/japuwejede/hbZQ4oe/repasuvaxobo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/piradi/nice_guidelines_maintaining_a_healthy_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/budakududaj.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/video_lagu_armand_maulana_sebelah_mata.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/26164664159.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/kgf_ringtone_tamil_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/46253312408.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/coding_guidelines_for_diabetes_mellitus_type_1.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/when_to_use_binomial_distribution_vs_poisson.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/ambrosia_magazine.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000152e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152E9 5224 bytes
SHA-256: 68f4491ace9425a45e513e47b425a2ef295c67088d574ea35fc46478e98853ab
font_01_sfnt_off000164d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164D9 12452 bytes
SHA-256: 0626ccbd0b2697c159e0e821566d07f66492b02c62f5a8a63d67eaabaa8bda28

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