Malicious PDF — malware analysis report

Static analysis result for SHA-256 84bba7b9261fc450…

MALICIOUS

PDF

78.2 KB Created: 2021-04-06 09:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae125e19ac1dd705a214e05a0c28c507 SHA-1: 7fd8f2bbb59531ef0252569b5ebfe6f355876711 SHA-256: 84bba7b9261fc4509b3370af29678566cd435264b5a13535ba838a2485b79db6
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains numerous external links, including a mass link farm, suggesting a SEO poisoning or phishing attempt. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=the+official+hoa+handbook+oregon
    • https://cdn-cms.f-static.net/uploads/4401559/normal_6017b6f1ded78.pdf
    • https://static.s123-cdn-static.com/uploads/4384483/normal_5feea0b8ca8c8.pdf
    • https://cdn-cms.f-static.net/uploads/4410000/normal_5fdabacc8514b.pdf
    • http://discount50it.pro/750413035954qpuf.pdf
    • http://carbackseat.site/tropismo_y_taxismolli3q.pdf
    • http://tcerkovniekupola.space/immunization_exemption_form_ontario_canada1rdi8.pdf
    • http://yesitalia.fun/950757006216wsmx.pdf
    • https://cdn-cms.f-static.net/uploads/4424933/normal_6064c12e0e8f2.pdf
    • http://nasty666.space/78191513029qsyhx.pdf
    • http://pro-komp-master.website/subudedobamovao2z8z.pdf
    • http://ipoteka.net/35529531495h3yrw.pdf
    • https://vajizekof.weebly.com/uploads/1/3/4/5/134594154/surajelisaper.pdf
    • http://uptodate.site/rizonox9hbdf.pdf
    • https://cdn-cms.f-static.net/uploads/4417221/normal_605bdbc213868.pdf
    • https://mexekujiwununiv.weebly.com/uploads/1/3/1/4/131407761/viwulolo-ziwalakedivewu-vodiwawifen-pufuzijenux.pdf
    • https://kojelokawuzu.weebly.com/uploads/1/3/4/3/134341929/dogaxagepijutepile.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xujitezu/vebitewelowivobesusofore.pdf
    • https://s3.amazonaws.com/tugumeb/javalawimatujorobisi.pdf
    • https://s3.amazonaws.com/fadupazageraf/74478764809.pdf
    • https://s3.amazonaws.com/fizaxo/mike_rose_blue_collar_brilliance_analysis.pdf
    • https://s3.amazonaws.com/mubefula/vobisuda.pdf
    • https://s3.amazonaws.com/safago/formation_aide_soignante_croix_rouge_geneve.pdf
    • https://s3.amazonaws.com/jasadavebaga/ipcc_report_2018_aviation.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ac.bin
dcad05f9a8cedd79ae470d8d632ab28e3693f8643881c9e1a23d35f9c396d6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 5260 bytes
font_01_sfnt_off0001058a.bin
697c32a8b85041c68b582ba190e580bea1e115fc0c3250e808253658155cd0b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1058A 11224 bytes

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