Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa3b94828fbda17…

MALICIOUS

PDF

90.9 KB Created: 2021-06-28 10:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 32935e3bd05aacfb225aff0794454062 SHA-1: d36f298a3fa2ffe975c109ec49be1395ba47a95a SHA-256: dfa3b94828fbda179a5a5288059085fd08a33de790e1f1d7c7913ddcd78ddf8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links, many of which point to compromised WordPress sites, suggesting a phishing or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external links on compromised infrastructure is a significant indicator of a malicious attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • 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://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c217b9ef9---68520993785.pdf In PDF document text
    • https://fruzsiflame.hu/userfiles/file/92626403410.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/juwemap.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/towilafax.pdfIn PDF document text
    • http://toyotalongbien.org/data/dulieu/files/pezup.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/takunopupuxal.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/prg1etn41pinb3h96hdgfsgpm6/pulaliwesumar.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85a3335fb2---xamadonijazobudevizix.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ca9a948fdb5---4587748224.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/21485244638.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e8e3b84aa---xobinujadori.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/f0e437c2e3fe7458ad6cb6f8bffcab83/55050106071.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/135f3e7b5cefd8c2d3b0de4d0f85cd46/54968116903.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608241270af6e---34002077458.pdfIn PDF document text
    • http://ezibra.pl/upload//file/93747222968.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089c0e3a0461---74754799118.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/bdbb3b13dd5b657c1a48f4d93fe1dbc1/wogozifuwive.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/matozitudomugiwobaxaxuwiv.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cb4e60e8e---wanupatedegov.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/29820416933.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/0352d14q8oairal3np335ikpp7/rebawebubil.pdfIn PDF document text
    • http://altinellerinsaat.net/UserFiles/file/34528179063.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cbb7cabf8---91152966484.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/qecq35uud9rbdgkescr74q2bbu/xelisuluzajim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pages+to+epubPDF 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_off00010103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 18652 bytes
SHA-256: 71136d7e9140a42c715ed2463eff37717072c593897e4d42ec63c80c83916bfc
font_01_sfnt_off00012f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14768 10328 bytes
SHA-256: de5bd438fe77d6195b0357067d67b3ce7618fc80238ccf54f816308e168a088a

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