Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fee0b2efff9b4c6…

MALICIOUS

PDF

74.0 KB Created: 2021-09-03 03:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b2b7c7941870b0fdaa4baefd636a1b18 SHA-1: 7c5ba7c1d5161307ded1db343e755c0e3f6117e6 SHA-256: 1fee0b2efff9b4c6875f2c73011a16e9a5b57b66aa62e0f7e09a71c12eda7d07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/cecce326f5f448924dd27702fddcd8a4/lozibipajepaxurakuluduru.pdf In PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/ludeworijixe.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/magisalevajogosuru.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/94846452534.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c271eb96049---61784816033.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/tevafitosalemutegat.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607746af342cd---zitini.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/gutaxibuka.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/61128386972.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a952cddef---sulofopud.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/5206076152.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160887b696969c---17677795055.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/34900175653.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/26811768849.pdfIn PDF document text
    • http://vkts.se/userfiles/file/23829523259.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c805b9946e---dudofuxufonezumuzopejeju.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/15845145649.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef86e25b2a---bizozukuvavivasalososibag.pdfIn PDF document text
    • http://riph.pl/userfiles/file/jipemijivapofunozizigu.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/29401456591.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609456e51a1ee---dugenusita.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/95090783743.pdfIn PDF document text
    • http://africareview.in/userfiles/file/xekifu.pdfIn PDF document text
    • http://cursosadistanciayonline.com/medios//files/38055165810.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=sdg+goal+13+pdfPDF 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_off0000c0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A6 16856 bytes
SHA-256: d6a2642e7b02386196ba8c1b8b992fc64136a460c64c8bd32ed50ade36dc6dd3
font_01_sfnt_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 10280 bytes
SHA-256: 1ffac6af6eba7e932627b14a13ef28edc6151798804e52f3fa3783bafcbb7746