Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f48cdd9ecf7acef…

MALICIOUS

PDF

81.2 KB Created: 2021-08-20 07:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cc3d629071abd193a13d6c7588a38f89 SHA-1: d68f9b26cfa134b5a7323edcb41baea235c83e2a SHA-256: 0f48cdd9ecf7acef079037936522dd70f7b8baa61272e5b93dbd3cc46e287b3e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609873baf3445---47499450998.pdf In PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4017a1bb505b907ee9ec4377b8fd9ee9/sadiduvozozasidibas.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073fc61e98ea---74753023682.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/denonanegefiw.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/tixenejuvolapenedunum.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/83876740742.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/62078806514.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/tegapemowunidotakasavabe.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747ad2514f0---wedizejereninusoziwe.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/japafuragilerozodoxizoru.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/xegavamediwowurixew.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/21249852880.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/taxutewivironigo.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eeaeda3209---gumos.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/zunawubonifupuxir.pdfIn PDF document text
    • https://makenie.com/upload/files/50945886840.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afe4511bcc3---wadirokemonukef.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3f6a9c847---tedeziwifufalixolikom.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/60757864100.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/juxivevozobimo.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/vusogulopijonorupulofon.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086adcece7c9---disurevogadojux.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/86172987591.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/5710e1c47acbd1c6c2bcda5714da6a15/keputolifefawufimuvagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=biochemistry+basics+pogil+pdf+answersPDF 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_off0000c3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B0 11460 bytes
SHA-256: 7eee271112a7a0713d695b000061746d7f323b3a18b6832774d52543faab4503
font_01_sfnt_off0000de49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65A 16188 bytes
SHA-256: 962923e27e7407c68e0b171ed0a00278ecc64805232e05ebcedc40fab5e214d0
font_03_sfnt_off00010c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C01 16552 bytes
SHA-256: e0b9ef0f48475f10c2db902b11d32f71c307786e0a4e35ceab681fda0178fc94

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