Malicious PDF — malware analysis report

Static analysis result for SHA-256 30efbe954e7e963f…

MALICIOUS

PDF

84.5 KB Created: 2021-08-02 12:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 656ece24800c765185d405f8f1fbd756 SHA-1: 5f536874e822f53f759e31ac48ea2b9db482fd81 SHA-256: 30efbe954e7e963fad9c1371835e0f15d04fa17655005d57bdc39f969f27a5a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting an attempt to obscure the true destination and evade detection. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://amuseonline.com/absite/userfiles/file/7127509835.pdf In PDF document text
    • http://batiment-tunisie.com/userfiles/file/bajekadikasisurap.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/rixuribunozofopasidibitaj.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/9v455bqfbtitu2lqjfro0fct5j/kutuvibitapi.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac3777f242---23869992653.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/vibaladefukuwividadi.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/64047712123.pdfIn PDF document text
    • https://shiphangnhanh.net/uploads/image/files/69265606193.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/koganelonupunufebo.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/megapidoledokigigopuxam.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/81200336100.pdfIn PDF document text
    • http://garderoba.sk/images/_file/77920996352.pdfIn PDF document text
    • https://ijp2.com/contents//files/fodelikefadabuvunitu.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/nedilavuf.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c03151092c---73657613368.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/voximifabewofobanagoviseg.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/88785655832.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/rijoritosu.pdfIn PDF document text
    • http://sns.hu/_user/file/20982725431.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/04c3766f437cbc1a8f866f7a7c30f19f/ramumudevi.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/mopetirix.pdfIn PDF document text
    • http://vkts.se/userfiles/file/79686769514.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4086057963d2fb98d9dd8e0f0a69cdd3/39727189569.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9491479ed8---novalamumiru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=a+aa+e+ee+movie+naa+songsPDF 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_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 17228 bytes
SHA-256: 0491481a95aa7dde717bbaeefb8e91464851809b9ac98006e9a592197fb589bc
font_02_sfnt_off00012d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D38 10256 bytes
SHA-256: d55adc3f6622aa40cd09995e1c13c8538d9f7f2c0d429b74ed0d54c2294f3dfc