Malicious PDF — malware analysis report

Static analysis result for SHA-256 5946371d6fbb3ddc…

MALICIOUS

PDF

84.1 KB Created: 2021-09-17 09:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a0ed027df0444904b1188b42a473e507 SHA-1: 2135a9337ba511a9ff01695cc2af1b07c69c3dfc SHA-256: 5946371d6fbb3ddca0483502118239e12a333c629a60fd9c37ddda1771b545bf
196 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are new or changed bank instructions, a common tactic in business email compromise attacks. While no scripts were extracted, the overall structure and link farm behavior point to a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://dd-eng.com/files/files/jajidiful.pdf In PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614026f21acee---nakesutimilemodube.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/43155247104.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cf7452a31---naxotalewif.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/tazuporafigigitu.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/niwudigedomedalarafu.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/jixujenaduda.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/0nj01orqhs2440cju2td2h4egb/80025641834.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/nataxifetabefukosi.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/xexumofipomawu.pdfIn PDF document text
    • http://packamate.com/userfiles/82638925001.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/kademafupufisete.pdfIn PDF document text
    • https://yuktogel.com/contents/files/58794682363.pdfIn PDF document text
    • http://hidropro.hu/upload/85792065029.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/pifanusapa.pdfIn PDF document text
    • https://fivetc.net/uploads/files/15380389595.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/16650086983.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/80766329097.pdfIn PDF document text
    • http://zeci.nl/im/image/nokepisutadarepekelex.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/65131951849.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/33223127689.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9aa6c3f12---jekokugiwagoxoropas.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/61764133133.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/lufakepobanilunixirakikaz.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/90936640153.pdfIn PDF document text
    • http://szm.hu/userfiles/file/luwafulukinumajegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=latest+wattpad+versionPDF 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_off0000e42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 10448 bytes
SHA-256: bac725739376bccccc8b85107cf197929acaf6436644ac760a6b219d80c031de
font_01_sfnt_off0000fc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0D 18048 bytes
SHA-256: c90347637be8bcb40d27e635bf1cd36767d584a2c182adcc6f3a21379c556f31
font_02_sfnt_off00012a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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