Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e01b5a85590132f…

MALICIOUS

PDF

82.0 KB Created: 2021-10-05 00:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 948ea11dffef0cad0ba50794525614cb SHA-1: 9e5eb05c7454d7573112c48131b13c282b8b97f5 SHA-256: 8e01b5a85590132f7938d5d8fe756acec9f340af2e5f738245adde54b27490eb
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one directly linking to an IP address, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is designed to host many links on disposable infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://synerhu.ru/uplcv?utm_term=electrons+and+energy+levels PDF link annotation
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338e800c0d8---48180024046.pdfPDF link annotation
    • http://georgewongdesign.com/gwd/upload/files/62570424341.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/12654862436.pdfIn PDF document text
    • http://gartenstadt-apotheke.com/userfiles/file/bimibineroroviz.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/34172089875.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/t0ms7ks3p846dpp3vofugfkm1k/bagizawimigapo.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/remajatozuwolubejesud.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/gakukiduworitusisulin.pdfIn PDF document text
    • https://booking-news.hkdnracing.com/webroot/editor-uploads/files/nopifugixebirofotezaj.pdfIn PDF document text
    • http://hainfelderteich.at/wutigudeveguxitudobifux.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/13395965392.pdfIn PDF document text
    • http://avtosfera28.ru/userfiles/file/jiwunixokimawul.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/xolodetug.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/lakowejosevapegirukizi.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/xabolaviselibizowex.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/merufarukude.pdfIn PDF document text
    • https://unosms.us/userfiles/file/vefolamividekojirugof.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/tuvibakaxenugazadawevu.pdfIn PDF document text
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/togugewubojudunuzisab.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/lelor.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/tezivewijatatujosa.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/73016562847.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/borosina.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/momijawerinuvixovabozi.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210910_6B9D9C7AFB02B12D.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/xorafipo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62B 10616 bytes
SHA-256: 237338d91a30faa7093ec590fd82fcee12717b287f60437c8ae996b101322d86
font_01_sfnt_off0000ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 19600 bytes
SHA-256: e89591892bc3220a84364a023dcf598667fdd0d098225a70dd8548b17091360b
font_02_sfnt_off000121da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1