Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17dedc746d47820…

MALICIOUS

PDF

90.8 KB Created: 2021-09-01 05:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 472ab78daeadf061ac4dde72d33d4487 SHA-1: 1d49f1a29f9d2c30ff9b50a0ceb373e4fec67275 SHA-256: e17dedc746d47820016a3ebf04fad6f8b5b6bb074f68cd16e0278ab0f4a3d109
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, and the document body was unreadable, but the URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://juraganmonyet.com/contents/files/99016042645.pdf In PDF document text
    • https://goodline.by/userfiles/file/lajerilizalefupu.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/608c865d11131c5171ae85a2ca4a9d7d/27344762447.pdfIn PDF document text
    • http://calisnt.com/uploads/files/donovid.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/1636641311.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202108280212331690.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611de7f352fd8---31711214878.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3995ddeae2064dc2019ff3dfe418bcf0/31530083911.pdfIn PDF document text
    • http://maksimetall.ru/files/nurazutixesitunam.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/65205367670.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/99431243059.pdfIn PDF document text
    • http://reunionclass.com/clients/7469/File/lokerapibetuwutozivuji.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/4e7k28p60o9vnctjnqp4cbma9j/telukod.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf26ae49196---woxonolarurajunizan.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/jupidurituvataw.pdfIn PDF document text
    • http://accronline.com/userfiles/file/70102495488.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/zubugitavawesezufug.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/25677607430.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/7ld3armf5rjh4npl21h5rfe5ln/garoxoz.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/7070a4283a2c0a8da0c8dd865f4a0280/zilixixewemapajexebiva.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/87906810278.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/19517674941.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/27627528844.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pammi+the+officePDF 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_off0000fe5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5B 18724 bytes
SHA-256: 28eb4460348790d6d6bf5455a7053a235566e518d641e2c51afe92ada34a0ff1
font_01_sfnt_off00012ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA0 10184 bytes
SHA-256: 58f57887247260c1154881a45494016a60dbc72fac0433f3bc44a1a99c6f48aa
font_02_sfnt_off00014579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14579 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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