Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde7e7baee7af8fc…

MALICIOUS

PDF

77.6 KB Created: 2021-09-05 01:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 32b8f28902aea570326fd6b9dbbc6c5f SHA-1: ee90119abe6cc71b4328e2a3da26eb14521048f6 SHA-256: cde7e7baee7af8fce0a007780aa26fa40145732327c6866efa49487409a0c808
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content, likely exploiting the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://ketchas.ru/uplcv?utm_term=calendar+2019+pdf+malayalam PDF link annotation
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/06de5dc59c6eae0ee7c52ad62abc5cbd/fapolorawozekokasoko.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc9ef62347---gapalojovimupomapedoguxa.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/vazuliwiwemabov.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/4f8095e174078438942bcd174687dd4d/divewowakigaviwamix.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610547704819c---89609984601.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/20543635574.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/jafixavejuxamavijuvupex.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/67721780126.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7cf29d1d184d6f256a38647b940290d7/63131060071.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/winopesesidibinototezepod.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/f9b07duae59hsjqpoga296bt4q/pedevigipapuvina.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210616124639272.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/woxobikuv.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/2075130093.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/8oeu58jlg2q5iidqid25i2rnfv/tevegudusujefolotasilimol.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/84370567051.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160fa715c7fbfd---98272623828.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901b90d1a88---gebofe.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1380d650a---53575686609.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/buq7hl7cip19mhodg6u4ajp74j/56352966260.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/1skcgdd1v5gn4pvlajhdi8g5kv/bogemixofigirojab.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/14705591105.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/nowumiravuzeveratuwizegi.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_off0000c892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC892 18104 bytes
SHA-256: 047a6a983b29dce24cc66215736c691ff88272c7b89c2c333a39620484d92319
font_01_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 10788 bytes
SHA-256: 7907d60a07593438f9184a2dc9a421fed2f699d84508e2de5a2757f94354b12a
font_02_sfnt_off00011100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11100 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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