Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe46bca457d4ccc…

MALICIOUS

PDF

99.7 KB Created: 2021-08-18 02:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 34c19e239cfa1a9ba172cf7a9aa11e23 SHA-1: 193cc2c2d0221c4bbacfd19382e45f34dff9829f SHA-256: 1fe46bca457d4cccb0a78cb068744e0bbd07fdaed8b0966a0f5860f821786eef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://mobydick-band.de/fckdata/file/gurom.pdf In PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/c7423b95c8767820ce7440890ab35eaf/38302474572.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b756ad3549e---dijajegusazoje.pdfIn PDF document text
    • http://stonebreaker.at/43237549658.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/zinatulodo.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/fb803c83cfb22ede67a80ba0ed85aacc/zajoputiwelejidenojuvi.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/borekezozatagavovuxagoso.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/51176287808.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/24427722754.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e34592ba---gozunefakulopokujigorebu.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609494955d365---sejawej.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608687a13e5fe---34061461330.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/kowemos.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/ccb2df5f26f35605baa426ea0bad7a0f/32466526340.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b803cb9d4---jezoranadipefakofapu.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/36097145176.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/7353bc11a84759331b8ca55918cf408c/90545465915.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/51593954515.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0363df2771---50201215232.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/gomedunulel.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/11288785623.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a788591078c---wegulo.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/divadege.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/xudemoxajazivatibuvagudew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ultimate+flash+sonic+unblocked+games+66PDF 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_off00012220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12220 17220 bytes
SHA-256: c06cbe69b3770cc8e9b2b09944cd7328bcf294c9a6d240b811e0c1fb8fa020d9
font_01_sfnt_off00014ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000166c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166C0 11328 bytes
SHA-256: 39bd795242c13969675a881d1887b6e0b2432f5db6980d059f491568eeffdfa8

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