Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6703a98ece62fc…

MALICIOUS

PDF

88.5 KB Created: 2021-07-03 16:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0336ff1b8fa0272f10d49715c7ea4744 SHA-1: 44a49faafa79fe87a495a4f6cd65f6c1bbcc9b35 SHA-256: 0e6703a98ece62fc601bd852bc78a1ee198f0c3709b55b9d75ea16ddb74475f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://irlanc.ru/uplcv?utm_term=lana+del+rey+florence+and+the+machine PDF link annotation
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a180a96414b---61856392900.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/boref.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d2035957606---mutunevakavovelabodogopu.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/mabovolovivakiwo.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ed81e94cd0f1eeb414a787e49298ad2b/44694812683.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/mf5nhn6ctspv79sqedp4id7a13/suwagemegof.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/35553987011.pdfIn PDF document text
    • http://strandedtattoo.net/file/95938602287.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8be6f20b4---28049254153.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/61500301422.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607294f1195a0---70601237228.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160992f1c337e7---gitazaruseli.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4f288dd2f---kivixetudozujuroz.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/dakuduruvarexivumogokeb.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/42284614711.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e866cabfe---tazebibolezir.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/bizagobobojivu.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6e76307f5a9a9a5d12713dd3ba6287f9/tikijufog.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/6753787271.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/mameri.pdfIn PDF document text
    • https://tecnicamistasnc.it/file/82017706416.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/nobos.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105161406.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/64906832592.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_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FB 18868 bytes
SHA-256: f64edfd11b5394d064d6dbbb7a773d782e4570dee3d99e9f12f3a8a59551c11e
font_02_sfnt_off0001258f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258F 16376 bytes
SHA-256: c0ce40a0db5da46198e8a330e54b405f016c0121b1c9e2ed55fd47191f7d331c
font_03_sfnt_off00013bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD2 10644 bytes
SHA-256: b800292eaa9bbf860ad01d19c78c1c45ee41d31aa67fa9c68f557b83ab87a1eb

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