Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb684c6cd5c7bf6…

MALICIOUS

PDF

70.0 KB Created: 2021-03-21 22:34:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f96049b38dcf2a098e22bb07d40828dd SHA-1: 2671eb85d30523f4aed8246345d7ad10b80d08d1 SHA-256: 3eb684c6cd5c7bf69fda83fee60baefac1bfb77e3f444cdf9f8ab18807b65475
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://lozipotod.ru/award?keyword=o+boticario+revista+pdf PDF link annotation
    • https://cdn.sqhk.co/bodorosuzuta/GHK2iaw/52758013772.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/gghj6jj/vowobivafomememiboli.pdfIn PDF document text
    • https://jaroxifapo.weebly.com/uploads/1/3/1/6/131636664/tiligokadusa.pdfIn PDF document text
    • https://cdn.sqhk.co/bofotabi/hinifji/zidirifirofig.pdfIn PDF document text
    • http://rufawefojag.sportsontheweb.net/31773182276.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/82hchfq/classic_rock_70s_music_radio.pdfIn PDF document text
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/vetedilalu_tafin_zilavifu.pdfIn PDF document text
    • https://bifotuvimutojuz.weebly.com/uploads/1/3/0/9/130969437/4b631ffb4b4da2c.pdfIn PDF document text
    • https://dewajijivixire.weebly.com/uploads/1/3/4/6/134638152/242d08.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/Ohh6cjg/android_version_list_with_images.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/LJUiegf/99469041958.pdfIn PDF document text
    • https://cdn.sqhk.co/nexifatogex/Y9gh8eg/xafiwuwutimabiwurawile.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/hPhcM5D/fox_racing_wallpaper_for_iphone_6.pdfIn PDF document text
    • https://cdn.sqhk.co/doburazax/Bgjieij/36936195.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/83R5PYc/23498631443.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/haZif8t/lodariwofegarafinuxog.pdfIn PDF document text
    • https://bujovuve.weebly.com/uploads/1/3/0/7/130738596/jojarijide-wijodebexil-kukezixowin.pdfIn PDF document text
    • https://cdn.sqhk.co/vivokunavu/iiWjdEk/35980372600.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/hbIgcgi/descargar_chuzzle_2_para_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://golinab.rf.gd/88532611008.pdfIn PDF document text
    • http://woxowezev.rf.gd/eye_of_the_beholder_2_game_download.pdfIn PDF document text
    • http://wenares.myartsonline.com/samsung_nx300_price_south_africa.pdfIn PDF document text
    • http://todiwefexoneb.atwebpages.com/wiwutar.pdfIn PDF document text
    • http://nudoritane.atwebpages.com/bifodetigidupanobawodevi.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_off0000d16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16D 5344 bytes
SHA-256: bbbeca42c58cdc4f61b80c41c806b6adc4116b98031c60269c162a858a65c9e1
font_01_sfnt_off0000e3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A6 12108 bytes
SHA-256: 15c0ebc016b46a5edd495ab7c555598c9f80b180ed360851b85021467ac1391f