Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92b06941c064ecd…

MALICIOUS

PDF

79.8 KB Created: 2021-04-08 04:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3c5a01da2b79653b7d0f5ad5af91cb4d SHA-1: 689e34df5216f468d81d68b03b1b18dd8e68a005 SHA-256: f92b06941c064ecd5cc9f1f01c1fc157ddcede0a92a475944ea26fe92eef1fa6
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document is a link farm on disposable hosting, reinforcing the phishing pretext. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/123?utm_term=service+agreement+contract+template+pdf PDF link annotation
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/wusifof.pdfIn PDF document text
    • https://vizosajigu.weebly.com/uploads/1/3/1/3/131381839/delasazepeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374853/normal_5fcb28c9ed7c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_600ceef48bd9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446636/normal_5ff78d90d4568.pdfIn PDF document text
    • http://gesavirosun.iblogger.org/bsf_recruitment_2020_notification.pdfIn PDF document text
    • http://fewogajala.22web.org/nkjv_cultural_backgrounds_study_bible_free_download.pdfIn PDF document text
    • https://bokowamimufap.weebly.com/uploads/1/3/2/7/132712050/xasaduvuxip-vudukalodox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_603facaf275a0.pdfIn PDF document text
    • https://dubarepexax.weebly.com/uploads/1/3/4/5/134586846/medinegamem.pdfIn PDF document text
    • http://jegewuzewan.iblogger.org/31213883470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_5fd09ec761af6.pdfIn PDF document text
    • https://pusemajipi.weebly.com/uploads/1/3/4/4/134471733/592893.pdfIn PDF document text
    • https://popagupo.weebly.com/uploads/1/3/1/4/131407300/nabaf_dejokodizejujo_gubikiwato_biwujigukarumek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujunuge.rf.gd/himeji_castle_audio_guide.pdfIn PDF document text
    • http://ribaxekag.epizy.com/panasonic_nn-sn651b_microwave.pdfIn PDF document text
    • http://runogonu.epizy.com/selling_car_receipt.pdfIn PDF document text
    • http://mewobunodume.rf.gd/pisanenazafam.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/spider_man_homecoming_game_pc_crack.pdfIn PDF document text
    • http://pititonekeget.epizy.com/aol_mail_android_authentication_failed.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/despertando_al_gigante_interior_epub_descargar.pdfIn PDF document text
    • http://tukudapig.epizy.com/39528537434.pdfIn PDF document text
    • http://pulilidason.epizy.com/webuzetokogufipimisapi.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/mubebomivevigal.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_off0000faf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 5460 bytes
SHA-256: 0398d9e4356a031c3dae4d479f64024161269c6512bcaf179860f7151eb4f45e
font_01_sfnt_off00010d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D84 10392 bytes
SHA-256: 8a497c8553c0e99ab8900a465b1486e5359c89eb1bf0fa39b86ddcfc6f462799

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