Malicious PDF — malware analysis report

Static analysis result for SHA-256 0707f09cb866f1ed…

MALICIOUS

PDF

91.4 KB Created: 2021-07-03 00:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0c8df81e56079628a118e322be6f455d SHA-1: 93fe6ca83403439169eb8cd6722d3584c20daf4f SHA-256: 0707f09cb866f1ed8df6095d6b162f80d4daecbbbfe5d8bdc600aebafc8e2144
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Multiple heuristics indicate the document is part of a link farm, with many URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • 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.
  • 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://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/0gk65gmql7bj4a6m0v4ge5l2bs/wusudelakuwixi.pdf In PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a11e71d9c736261705eaa913096ba2ad/sajadome.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/48062874560.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d79f721325a---teninasawifajowag.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/91652286654.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1977f108c---vesudegabulajojuterubad.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210525174714627.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/pimam.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/r2q8s2dpgmbkbgqi9aftooumit/zejakigafapeziwijuponi.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/safuvipemokudereki.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5f6021ace---wosofirit.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085894db3da3---44949305013.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b321bb88f2d---2409546172.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35e5e071e9---20509688332.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16077cfac7994e---54261839703.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/muterozedejezegamuzusazuw.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a481834b949---bexuluxotufefijupoboke.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/6fd25e377324a387df1b3e7e87bfe5a8/jowuniligu.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/bubaxilugetun.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/98159700481.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b258007d832---xazanomofewexuvegen.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/d4fc61e16304294d092a49e2067ea5c5/fajapewuzuva.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/biwekiwesore.pdfIn PDF document text
    • https://yuss.it/file/wudotimuzujifuriwekedas.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/25ce431820a63d841033186ea4cc82dc/fegewiwomazufu.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/0757e952eeec98dfb19568dda6a648d2/89238472535.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/lozowesimimoxusepijilasek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=nightingale+theory+applicationPDF 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_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 17232 bytes
SHA-256: cc52bf105e3e26064f304fdd3b46eacc22394f46b763a1aed1d2a2462cd271c3
font_01_sfnt_off00012e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E67 10576 bytes
SHA-256: ee074ccd92caeff5a65c41ffaf1e278c2396d47534e8cfa8baac98600a6fdb5e
font_02_sfnt_off0001467e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1467E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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