Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a45670e3276946…

MALICIOUS

PDF

76.0 KB Created: 2021-05-02 17:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 017ae18dd04d3e457ac64e1aeaa07d75 SHA-1: 690378d8b2a64a1ed033b6207ae7c93f6e371b7e SHA-256: c5a45670e3276946c5d1517316645d7bd5e325f249d61c59d266f75552c0e6df
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirecting to a malicious site. The presence of embedded URLs and the PDF structure point towards an attempt to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=que+es+imagen+artistica PDF link annotation
    • https://sanejivuzagegu.weebly.com/uploads/1/3/2/7/132740711/5640616.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/XMiakYK/75443911969.pdfIn PDF document text
    • http://bunutib.mywebcommunity.org/kyokushin_karate_training.pdfIn PDF document text
    • http://prequester.online/elle_decoration_uk_media_kit_20205oy2z.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/chhHigJ/viking_bay_resort_facebook.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/parametric_and_nonparametric_data.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/4gamers_officially_licensed_ps4_headset_-_rose_gold_review.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/hhjdhaY/mewebatiwipemelemuko.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/unique_selling_point_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/jFQOid6/espn_fantasy_draft_kit.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/livro_aprendizagem_organizacional.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/igeWohb/open_secure_folder_s10.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/geSgdG6/octopus_plural_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/uXgh9ig/ballet_classes_nyc.pdfIn PDF document text
    • http://firstsecu-paypal.com/moto_g6_plus_mobile_specificationcxpoe.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/c6f08.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/niihbLt/nagejazuxixepasu.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/jotizifime/70317037665.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/lender_unable_to_pull_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/social_media_analytics_spreadsheet_template.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_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 5148 bytes
SHA-256: afef0a51c1901d4dfaf5903279c882047e41869a2c2b69f48d2c833ec254ad6e
font_01_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 11540 bytes
SHA-256: d4ed7eae84c1d26b40f5283a118ebaed9ac3be26643b91e330d0f0bf49ecb32f

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