Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5a0f62860af5ea…

MALICIOUS

PDF

81.8 KB Created: 2021-09-05 01:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8a90dfbca29612b0bc99bb1ea4fd40a0 SHA-1: 4289643d913dd1353937b7e56892843fffc331c4 SHA-256: 9e5a0f62860af5ea1ce9b44160f85eca35b21e308ee03bab31a949df7eca9b9a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, indicating a likely phishing or malware distribution attempt. The file's purpose appears to be redirecting users to malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://synerhu.ru/uplcv?utm_term=cisco+firepower+configuration+pdf PDF link annotation
    • https://novahealthclinic.ca/userfiles/file/55185480395.pdfIn PDF document text
    • http://inncredel.com/uploads/metobunotos.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5b1be27b4---77327135031.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0567a1df2---71552337809.pdfIn PDF document text
    • https://csn-alliance.com/data/files/12689780013.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/72587169411.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9c73b4250---73999057398.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607764a9be510---74581347426.pdfIn PDF document text
    • http://www.asslar.de/downloads/19863766694.pdfIn PDF document text
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/26433415890.pdfIn PDF document text
    • https://ebooksweb.net/files/file/zuwufifabukibesapuli.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/ximotegibosi.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/4f83f4727824eac35abdacaa66433441/99126446883.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/kajevubotosajoz.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/nelokomorala.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/45717260298.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d892ad9cc14---52734227527.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/pojulanirigetut.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/d3c3279df11864ec243396a6db95ecbe/pufisaxuk.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-05-27/images/files/40661142968.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/22606660540.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/zuxanilejudegagizowakugoz.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/gegekojawesut.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/lotadivipipizedapazeliwit.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_off0000db25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB25 17332 bytes
SHA-256: f98a6d93432fd161c5c06fd8faf9136708dcd2d2e706e6f3b03f1cf872d45315
font_01_sfnt_off000107c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDC 10968 bytes
SHA-256: 9d51d23cbad11822dddb5992f8f252526a88e4c520b0398af4fb8ae2d9c6435e

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