Malicious PDF — malware analysis report

Static analysis result for SHA-256 09aee9111bd327b4…

MALICIOUS

PDF

81.3 KB Created: 2021-08-24 04:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e1314841045190d33fb47a3241cbfb6e SHA-1: 7eca7abf64525c7c146d8619d59ff549c3dd4147 SHA-256: 09aee9111bd327b4909afe197e1150da29fe551863512706998f75fbd46b609c
176 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and URL patterns suggest it's designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://szilasfood.hu/pic_upload/files/pefifiraxunegabamo.pdf In PDF document text
    • https://aspaeng.com/files/image/files/doboxikofelutojef.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f973941065b---56944726882.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/dawinewuzenu.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/wanizukinerit.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dff1f12cb89---podexejejozod.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/26780074833.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/54573074917.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/tutotaladupegenowomomew.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/03v9rst71sok1734d974c9kfsd/30711947103.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/8048576651.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/69308174690.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16073d23f392e2---kobamezomub.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/nusidutixorax.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/78d55b464715a64bed832a9508a41967/vizokuxof.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/59171235637.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/javotoxovadotiz.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/43981aba8d5a0b47ec25cb22b224e68a/kelafeluderisajovoz.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/e19e35eb2af419e9589ba32c87e1b101/42586806982.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ve3530bpcljvl7pap8g9010ou6/jegobamewukoto.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/motarefanevip.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/julesumofadajozesizarakos.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/7vqqj97o604mj0mrk5h8p9rv8j/23137858097.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce2ccc8ce5---23502599257.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917f2ca5446---xugezakorer.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/gn3nac501jot713mksprgb3if0/22734241335.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/49730287645.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=24mm+dotted+thirds+printable+freePDF 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_off0000d869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 11004 bytes
SHA-256: 591b21db6d76a151cee31568abece863ee04e6179b6de51ad3cbe58841954738
font_01_sfnt_off0000f193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 17104 bytes
SHA-256: b79b67f9a552381826f1997747556c0933b9d9b760e087f8db17a87009ef2b80

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