Malicious PDF — malware analysis report

Static analysis result for SHA-256 df250974678c8cd9…

MALICIOUS

PDF

100.1 KB Created: 2021-06-26 02:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df42cfee2a7336cb00e0eb7ba922aea9 SHA-1: dbed1af2155df8113d61bc2986472643ab871645 SHA-256: df250974678c8cd901529ed0bd271f691a4d47e10d0c44b58a58d74246c9a286
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm with numerous URLs pointing to potentially compromised CMS upload directories and disposable hosting, suggesting it's designed to lead users to malicious sites. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware delivery lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://sattamatkapatti.com/userfiles/file/sedevegujito.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/j1u1ufal6i8ep34j12j338p5ab/vudaguluwujovinu.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160742f4346915---52216369338.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/hp1qq1m809vpasu529ckvcf563/dasopezonerafolinigu.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/7210d1c513e9361d03d63bfb14ceb549/wanonidibomabesolowejusup.pdf
    • http://xboxheerlen.nl/userfiles/file/7365939810.pdf
    • https://acryl-bg.com/userfiles/file/jatugojedibupoze.pdf
    • http://aloeverajuice.cz/files/file/99809801431.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/b4a9c728f32722214a38ccc611aeda74/sibiwufobemebiko.pdf
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/rabokadebuzukotus.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ca5be6228---33678521887.pdf
    • http://arniestribu.com/campannas/file/27274808681.pdf
    • https://echipamente-scule.ro/userfiles/file/kovejitawigugu.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/bba9ff884b086098d71aa1462eb8c8fb/5346028797.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ce7de5335---jepokosuzut.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160ad031c20aad---90428542531.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/0e62afeca44c22bd8c847fd4f967b9f0/77753599287.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/0523503fa89481019a2b72549cc9eba4/palurolamisufexumumomij.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945983b5897---bivow.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/d1aadda42f8ecea42a727638c12321d7/poxaxokosovamukofeputo.pdf
    • http://niestachow.pl/data/aktualnosci_imgs/file/92411385371.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f935bc7ed2---rifoditojabupuroxojugur.pdf
    • http://best-infosystems.com/userfiles/file/zimepaxojowebesabibisus.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=method+validation+in+hplc
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c379df51e5856e81f08e604b3d245980/27935535122.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 16792 bytes
font_01_sfnt_off00013e03.bin
60ea65ffc61b2fa1cb5457fe56978aa9b78e1ede2d86c3b925f9ff62422d9389
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E03 17320 bytes
font_02_sfnt_off00016b86.bin
8f6c2ab1a674b67ede10e2eee36b98a824adb0c5e6f43113a06c51beb15933fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x16B86 10400 bytes