Malicious PDF — malware analysis report

Static analysis result for SHA-256 78229cfd144833c2…

MALICIOUS

PDF

79.4 KB Created: 2021-09-23 02:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e235205d88a879dcbef3e8a9567991bd SHA-1: 8c8667da1716f0928f7372c443df24773b09da3b SHA-256: 78229cfd144833c2facecbea9b281f0118035a2f85d497671943279c5bd33546
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious sites. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security filters. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://crysiq.ru/uplcv?utm_term=how+to+activate+safe+mode+on+android PDF link annotation
    • https://cgeminfos.ma/upload/file/23888275120.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210923064605574.pdfIn PDF document text
    • http://peoplefoster.com/pliki/wonaki.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3392d4d35---75433744437.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/xajuri.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/lawawujizipadepizunewomu.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/667c78fe00d3b5cde43f5436c6e2bdcd/42667156259.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/97815771366.pdfIn PDF document text
    • http://myredm.ru/uploads/file/jawopodofedesa.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/69931918249.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/18560113621.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/23858320493.pdfIn PDF document text
    • http://web5gstore.com/Files/files/52767511968.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/30581772543.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/xuzubokiwurajomabufazim.pdfIn PDF document text
    • http://ghespanail.com/fckeditor_userfiles/file/futapulabuzudifunogejiwej.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/92576355373.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/17568119138.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/40223304206.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/61561344227.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/zobetapafup.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/45018791402.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/jigukuriwomiwemali.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/4713e5d45954f28de58ce19161939797/95257096691.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/jakuta.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/76889720847.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_off0000d18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18F 10732 bytes
SHA-256: 49757bc67b0a2d970848cda4813d9ab94502e59db03574d4928f95c4e1988c96
font_01_sfnt_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10252 17704 bytes
SHA-256: 97e5d79f9f7fa41330785c39bda4aa2705849d09d737f5b154fc73e7f92495d7

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