Malicious PDF — malware analysis report

Static analysis result for SHA-256 090e58ef2f0fec6b…

MALICIOUS

PDF

83.5 KB Created: 2021-06-28 13:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b10c05646c44cda9a35747d869d409f1 SHA-1: 1f6124036c45bce9ecfea127605100ebbc3925e0 SHA-256: 090e58ef2f0fec6bfc16e0ff9546e25a6972c5da07f6813a9f22e4e8d8519288
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://oniceh.ru/uplcv?utm_term=force+on+a+current+carrying+conductor+in+a+uniform+magnetic+field+class+12 PDF link annotation
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/os6an8pbisgb2hsppcmm8phu8a/15646969925.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/96854714292.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/sewafagirunubepixebajuz.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/82492841399.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/86001708422.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/kusunerugeritexikuruzen.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/mijefewosokuv.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210611082332_2ot381.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609482828791c---wabadujotolukilofuvitavop.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/gozanowovimumanope.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/97937354917.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d379a8d245---vefesesekoduzomur.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/94334895829.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/9iu4q79sfpogjrcsj2tkljeoc3/nunoraz.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/1250ca31acf4c87b6151c700b77723a4/31093243750.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/qre74b0hve426u4v6hmqun0nvr/xobejoridibizorotowi.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608881b4919b4---89913951411.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/xidefikewu.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/n2u87vc4dr99749a095vld06gm/sumep.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/wuzalefezasi.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/bolejejilof.pdfIn PDF document text
    • https://slide-bearing.com/d/files/3808100863.pdfIn PDF document text
    • http://abpaluso.com/upload/file/jamenelunikesufadon.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6E 16976 bytes
SHA-256: c8c2e5e51699fe83fcff81f0d9eff00769711040ef5be77830e1f677f79f7eb6
font_01_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
font_02_sfnt_off00010d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D17 11180 bytes
SHA-256: b33a3b0ad4805f78e72eae0d92b62371fd9307cfc803fc8443578c4352a7bd24
font_03_sfnt_off00012727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12727 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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