Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be17f8eed333808…

MALICIOUS

PDF

104.4 KB Created: 2021-07-19 08:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 09f332a64c83c8f58d3578b0de56bb15 SHA-1: 245dd3ec46b8e0d452fa75173c878fd96d2263ee SHA-256: 5be17f8eed3338080e131ba3664b18086fe1f1be152e57ebc72bfaf77d6d90e7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mundori.com/js/ckfinder/userfiles/files/61687315521.pdf In PDF document text
    • https://tarzminder.com/resimler/files/vozaseselo.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fc5b70a74---32203467421.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce0d11f7b6---moleguzovokiwomuxidofoxo.pdfIn PDF document text
    • https://menu2uplus.com/images/file/bikisowoligupapepum.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/3559274247.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/21uhdakuk1g9hl99361gpcka80/19307899873.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/b5b93d1cf6e5c84c03051c2e5d537453/xamebomakijaleb.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/72866524895.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/5d5dbfa1aa5121867c76f34011c127b3/53000078583.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210530_D73481F8F49FD801.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/zalidepolazoge.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c604cc214e2---kozagobugexad.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/98135269669.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609988f672d14---ritesometomorajegukukitev.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/50bce38d1171c7216948f22ca351b053/78827151623.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccf5f4e5fe---lojesasibepamobepamowozuk.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/0bf75e643c1663cf4dd641e65e2075fb/58640226084.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/842f8e5b4f04145fed6828e2d6468e75/mujababewidadujonalunav.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/mosulumorenerojopi.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e78e6a14ccd---6449576622.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/49b9889cd2acc40efe5e835fe0504570/lemopimixikozu.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021052005540324.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/6724052893.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/lhq2if22scffqtrdd81q37h625/25680417386.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=buffy+conversations+with+deadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E3 10944 bytes
SHA-256: e4e6ff7256b6031345cfc7a34a7515c24556aab17736410f97e92e54ceff645f
font_01_sfnt_off00013a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A62 21852 bytes
SHA-256: 050739376a642303127f8d23d706e6ff5fa3be028bdce18930088af1cd65506c
font_02_sfnt_off000171b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171B7 2564 bytes
SHA-256: e01576534e24482f46e74ec1f5addee898189ca7911b47e0771daa6fe98a5de9
font_03_sfnt_off00017cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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