Malicious PDF — malware analysis report

Static analysis result for SHA-256 793e29a4d7009ea5…

MALICIOUS

PDF

95.9 KB Created: 2021-07-05 20:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3b7ad6b28c53a114dbac1c206c4e9ec0 SHA-1: b1b7d81005a8d280973ded5e0eb77497c08c47c9 SHA-256: 793e29a4d7009ea575521fb37ceac027c9874c3078d7130a9de20433010ccc84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload storage, suggesting it's used for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/g1ppd183men2qn7h5hu2rqb4uq/jifovu.pdf In PDF document text
    • http://partnerplus30.ru/images/fornews/files/14829282166.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/doxomizisajadedo.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1626b4f2b47b5cf7d72775c499b852c9/wanafawowipogisenutoxomol.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/u0toskh18c4l7q07tuasn3bhn7/vuvaku.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/tiwaruxixukemetun.pdfIn PDF document text
    • https://cmoretv.com/userfiles/podiri.pdfIn PDF document text
    • https://mollis.rs//files/timakomonewo.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae99ac05f36---fimipikonepepibeni.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/55371158272.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a573b88294c---74090878438.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160861d889377b---fusitaxonigenoberafol.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0f9460e5f---65635425705.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/37775524351.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0c8a2a090---bekonutir.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4e187241e---16985584906.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/33722186011.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/57629442f10f6d38737a971b77396dc6/15414131538.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/21326039835.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/tanurosexulugunomat.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/j80fft3fhm87m8912dlcteruek/4693111796.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab36b1d48a9---41996488351.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/mifizemupefosimowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=national+climate+change+policy+2012PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11328 17688 bytes
SHA-256: 0727cd1f9f2d504211c995c6334e8f56467fc4e8dcc6a2c4dc394406a526dc28
font_01_sfnt_off0001413b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15952 10936 bytes
SHA-256: 614841532f1d6389db48084aed74d71e3b07b58456cdd82978e060d64a815689

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