Malicious PDF — malware analysis report

Static analysis result for SHA-256 71483f7ee59da0e7…

MALICIOUS

PDF

211.4 KB Created: 2021-07-29 21:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 32bfb4d96ae72b6962598deed7c3ae90 SHA-1: 7847793ada626b6b1fd30e5cbe3c91ab84e9dad1 SHA-256: 71483f7ee59da0e7e9f2d9aeb30c1224863dfb65ceaa800d8b449b88647eaec1
126 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal that the document contains links to compromised CMS uploads, suggesting it is part of a phishing or malware distribution scheme. The embedded URLs point to various websites, some of which are known to host malicious files, further supporting the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7752

Heuristics 5

  • 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.
  • 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 http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/15695990429.pdf In PDF document text
    • https://avonsteel.com/UserFiles/file/pejugikezuturuvirab.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/44610271760.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/7111f6f43a36879f2522ecac02be0d06/32149522333.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/62518264435.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/tplmc2u1h7g4a88tkl2i6u9r11/41154766063.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cccd5d6c5---puxuve.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f5eb529bc17---89276244004.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210709101540.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/20707321344.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/ligudusidosaradi.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/tubedal.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e682155ac1---7360388200.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/13563777297.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/59217688217.pdfIn PDF document text
    • http://seritour.com/rsm/files/kinipasirelodogudifevi.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/gadfgqe5tvn9ohc36bvtgfupub/ladoruvonabej.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/sabovabubuzebik.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607397d06771b---viravo.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/73bb8c64a7272e9e163ea396597a6270/luxozotujodozarot.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/f3d47kgt771uoe590l75u40fu6/79404626928.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/32941715095.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/piraxemesibifivel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=pr%C3%A1ctica+forense+civil+y+familiar+%2F+carlos+arellano+garc%C3%ADa+descargar+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002bb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002d38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D38F 11420 bytes
SHA-256: dfc19ef2191edae85fb7f1930030294f512a9d0ac6d26e2f5c585c3b0f7ea10e
font_02_sfnt_off0002edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDF5 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_03_sfnt_off0003036d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3036D 20944 bytes
SHA-256: db02f568272ef3c0a63ed001759f068f1bb70f2afaecf21eab9f9174b678a909

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