Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebb1f88efb48a19…

MALICIOUS

PDF

88.5 KB Created: 2021-07-06 00:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2cf1f6b438045d101f77b29419b06535 SHA-1: cb90422bc1a72d5dcdaeedb6501870e9d268b1cc SHA-256: 8ebb1f88efb48a197f09dc797a3ebc131deabf1d2be0eedd9af328b1ff4fd608
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://adsbudget.net/userfiles/file/kamijijatilagalixiziz.pdf
    • http://laatjehuisweerstralen.nl/upload/file/mibenezi.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2d754fc0b81180d9e1453f5a70b3c665/migoru.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e372f969f86---7434347423.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd7cf12a26---88102929329.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c92f03a5ffd8e5b452c9a896335a38c5/93410475963.pdf
    • https://nnkcreations.com/userfiles/file/28481665619.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/is4a9gen4pagiid6j2o45lkajv/20033216591.pdf
    • https://legouic-peinture.fr/userfiles/file/bufowuvorajesatagam.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/92a488ac9fbe6b551bda9ba3467c1c4d/jenikugi.pdf
    • http://sattamatkapatti.com/userfiles/file/posepufejugaw.pdf
    • http://ciskmv.com/css/file/76616957408.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/eb3nl5men34qnhdr881vfectbg/99944509988.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/e89098ecb58ab9ee33e8d452404cbe09/97925909733.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9db23e11cb---83128958928.pdf
    • https://samsungklimalar.com/upload/ckfinder/files/bujiwabifob.pdf
    • https://ascinfratech.com/clientprojects/trading/file/9358583151.pdf
    • http://agcslohian.com/userfiles/file/48783000943.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813c38f0fdc---ledetovoxenatakiga.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/6n8huv0vsqef2mtdb4il76ip8c/47905104807.pdf
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/45799653957.pdf
    • http://picassogift.com/Uploadfiles/files/nifigef.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9112bdb76b---52106997675.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/eed6815b2dc457fc0d41e259f2a692bb/18068251094.pdf
    • http://richfieldhighschool1969.com/clients/868116/File/2944816430.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608214582f566---tujabuxabupapapizadulonen.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=communication+and+interpersonal+skills+appraisal+comments
    • 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_off0000f7c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 16792 bytes
font_01_sfnt_off00010fd4.bin
1fe86f8afe27e78e36a696581e16daf9e713410df0060d0c898d134fe795801c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD4 16812 bytes
font_02_sfnt_off00013b0b.bin
27207484a02323b6854d94ef893f34bd9a154b4853ea7002c403e4fd121401f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0B 10900 bytes