Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed83ad4a26311a9…

MALICIOUS

PDF

112.8 KB Created: 2021-07-19 00:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9eafbd52aed55cb7b5d8aca56c94f69c SHA-1: 982682b51e874ef0701c6ce78073d45c9b0e754d SHA-256: 3ed83ad4a26311a9ecf9c917a4bd1820684972be6ce726e69524d4d04a262a87
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary attack pattern involves redirecting users through these compromised sites to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

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://europavloeren.nl/siteimages/file/17369440828.pdf In PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/47fe3fca0c7c686a747fe473d3e7f5f4/tutikiberegu.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/41728566465.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/tirakawexekiji.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e1407035a---logiputariranovolubeli.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/aen2nbp3bg8g3u8k9gok58u2hh/56852700376.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/8a164bdd4fab8040637ee0bfbd0dd200/38495484191.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080bc7505dac---18936568006.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c251d9e99d5---54304153836.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/qmnaq747jte9q7skgg0crs5eee/52727742043.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607905420d4f6---jomamax.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752d2d1cff3---zofebubobevisog.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/qpe7h4jckdr7cbd09o64kv8ko3/37112463976.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/sififodiguvamowitatoxofi.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/xiwupawo.pdfIn PDF document text
    • http://rentaruedas.com/files/others/53412999337.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/3003979096.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/6bc881ffd1ea69a3ac55a66fb660e7cd/53529191826.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/6395174749.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210702_54A8FBE50D53C4BA.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/5r6a0iml08uj6eqqf471as1c90/zezodatadavinixigojaja.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/tafeduvokejim.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/pinujatoxogal.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979ab36a232---sirujudinemawamajusavod.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160adb0f6da4d0---95137442878.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=phenytoin+interactions+with+foodPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A21 19328 bytes
SHA-256: 1a987c4999029a8dae787c77e2678bad85e20ff7990d6d65276a05c2951420bd
font_01_sfnt_off00016d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18511 16160 bytes
SHA-256: 61893c6f5a4ed8be90b59e62ba5f7845fe3f782be61d2927f64273611613f2a4
font_03_sfnt_off00019aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AA1 10728 bytes
SHA-256: 33db9c8cab83005ae51f2edc55cc6ba7dec5a08af1a6a5752c681a2ef10b92f3

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