Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c609968d6080e05…

MALICIOUS

PDF

69.9 KB Created: 2021-10-04 01:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 432adefb103038dd018cdf57299a500b SHA-1: 15ca9491b407412545e43698432ddfb623bef0a2 SHA-256: 1c609968d6080e0547b40e5f081fd4d0195108b0638f7776e02f996835329f72
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for exploiting PDF vulnerabilities or redirecting users. The PDF also acts as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. This behavior strongly suggests a phishing or malware distribution campaign, with the embedded JavaScript likely facilitating the redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://dailygameresult.com/editor/UserFiles2/files/fanudurufumapi.pdf In PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8379991985.pdfIn PDF document text
    • https://timminsrenovations.ca/file/BHh7CF8MaIJMZw48.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/79636561495.pdfIn PDF document text
    • http://ban-dong-ban-mat.theonejsc.com/userfiles/file/buwunadiluporaze.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/13580060786.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/fununovu.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/puxet.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/12714898521.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/nixob.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/ralivolopunuvovazuzok.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/59007561196.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/56928207881.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/pasegivoka.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/pafatifazawexofenolati.pdfIn PDF document text
    • http://preiss.at/upload_files/files/baboxewuma.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/3513406380.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/sazaredexodep.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/mebutivefexufemalodefere.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158d9813bf81---besesugulanebolixarozu.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/10849863818.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/5d0361135572f16cbe4e6c55be69e6b8/rusafoxoxenuj.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/muwasavoj.pdfIn PDF document text
    • https://kccegis.com/upfiles/content/file/20210919162459.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=common+computer+problems+and+solutionsPDF link annotation
    • 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_off0000b345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB345 10948 bytes
SHA-256: bb7e24da0b679e6ab5c4c2b46b8f3f5124db00ed35d613bc97f91fe2a242aa4a
font_01_sfnt_off0000cc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC58 14892 bytes
SHA-256: cdfffb45d2b537b604f1a0b5c07207ab136dcd1d9c79d0ff660fce64cb6ce793
font_02_sfnt_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1