Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07a66d206873652…

MALICIOUS

PDF

79.3 KB Created: 2021-09-12 08:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f2bb67338b5b959a0f00f1ce0c98938f SHA-1: d7812c8a095724049f2d1b42bb918b45e7a6d944 SHA-256: f07a66d20687365254f8daa7381262806e29cc1427d38a44d0bce941e92e7e37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of 'utm_term' parameters in some URLs suggests a campaign focused on tracking user engagement with specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://irlanc.ru/uplcv?utm_term=soccer+league+apk PDF link annotation
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c97a04593---rawifalixek.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/46862349079.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/67308990951.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/81861399744.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/74423286426.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/2023766046.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0aa2d3b52---7672473107.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c93e45730e---vakozadipokefetak.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/falej.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4194c6d71---rapifefadofusele.pdfIn PDF document text
    • https://matratva.in/userfiles/file/49575660306.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210908234748.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/fagaxelowokejufowefekaxi.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210902_131523.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/rugukipotilo.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/22242454038.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/rowuw.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356631219be---18771941211.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/26355715579.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/19855629715.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/wujagevuruvudijisulafoga.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d265bb037e---musulep.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_off0000c92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 10352 bytes
SHA-256: cbfcc464bc3d55704d7bf451431950661f7290ecee9602a3894e303e6d9177f5
font_02_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 21472 bytes
SHA-256: be3afc186063bfb572dd7092ea547862613d1518083d7796ad5cb9f759569ed7