Malicious PDF — malware analysis report

Static analysis result for SHA-256 47334c4d6df695da…

MALICIOUS

PDF

83.5 KB Created: 2021-09-05 03:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c806d2c218e6d8fe36607343f703a03c SHA-1: 8aa0f8d25627af89773c43919506d01c4e1471c7 SHA-256: 47334c4d6df695da6e9a5f7cd78ec4c64bd9ba29e622a3d46110c26768880690
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or use UTM parameters, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=converting+between+metric+measures+worksheet PDF link annotation
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160887a7f66351---tajepuzojegile.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/11825697059.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/gevomodifozavudezujadez.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/qthhgb4caqr945dpif9gimfr31/juwasokeseneminepul.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/54320567751.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/23765485729.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082fdca1b07a---kideroz.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160742b645cf59---833557309.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942257b2a4f---bonepijerogi.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/27035236853.pdfIn PDF document text
    • https://marmetal.cevhertemizlik.com/userfiles/files/malunudobopem.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/lavowulosoli.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/87427276412.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/91322620692.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01ea80587e---mosixinom.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16099a3904deb6---18774395067.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/pomewufixape.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078b075c856f---gigerod.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/nenikaju.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/bijefonusol.pdfIn PDF document text
    • http://liyangah.com/Upload/file/ruledaxiradaxogidi.pdfIn PDF document text
    • https://timminsrenovations.ca/file/JfaYJKD0ITg09tHB.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/varaxubexezatorekepel.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/f7d5af08939f91646bda5f30d2b5ea19/wibisifitewulurulopob.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_off0000e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 17224 bytes
SHA-256: 85557bdd9201f76ab68085dfe622e4a0a1fc1dc784b0fb5f9801f2fafc0b8f39
font_01_sfnt_off00010df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12607 11148 bytes
SHA-256: 8a11ce555dfd6cfb0fba9a2598aeb840c299ff050105ca1a0805c4fb25e74d13

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