Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe94f4bbd92bbf1…

MALICIOUS

PDF

70.0 KB Created: 2021-09-26 06:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ea2fbff0fa0b4ba47278d9a92dcbb061 SHA-1: 2bc66a41f8c1e6d323c883ed3940f56c2a6d8854 SHA-256: bbe94f4bbd92bbf169a00a298273b8ebd13ee94ace568dc5f74667ea0ea0a14d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host a large number of links, potentially to spread malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://pixomot.ru/uplcv?utm_term=orange+high+links PDF link annotation
    • http://homeshopeez.com/uploaded_files/userfiles/files/58312177676.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/35249182272.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/35573568262.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/wajudofapedaduka.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/8jfo3j5bf109clktvht6ot3p65/31882506825.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/ketoxetatabomubab.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/tiroluboneselini.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/megofamona.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/70729299187.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/wuluzovozujikorinedu.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612feb743d080---wefiditasewinuzitan.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/kuzekefa.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/3469093995.pdfIn PDF document text
    • https://31app.com/userfiles/file/39828803700.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/99410062899.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/jajimesobutadarakak.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/loxafixapinobokukewefeki.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/30001809242.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef08d3a76f---49847898680.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/rcgjf1qqnepvl90mv9fo1h7i9p/ritimitina.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/51780457717.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/pekikixituzopunat.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/38596061678.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/kefevuxazowobenapufe.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/21499606513.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/bc473pcb13sssfeql2osq4sbk7/zifujomerevasabanos.pdfIn PDF document text
    • 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_off0000b338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4F 10284 bytes
SHA-256: 762a2d94f81d542fc2aa8306238ccbd1a9ffd13382a288d9ebf518537a8318e3
font_02_sfnt_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 15076 bytes
SHA-256: 77a29395e2bf9c28bb118dc6a1d25a99ebdb1b7ce922cb26bcc25623e8aba575

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