Malicious PDF — malware analysis report

Static analysis result for SHA-256 7adf1003d113560f…

MALICIOUS

PDF

92.8 KB Created: 2021-07-25 03:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c986908e47e4d546d6faaa5c54103843 SHA-1: ca3e8f7db52830b9402a294c2c18e9902359e86a SHA-256: 7adf1003d113560f3dd289f865d9f74614cd625a9d89617c887fd282d49994de
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of phishing and credential harvesting. It employs lures related to MFA/one-time codes and payment redirection, suggesting an attempt to steal sensitive information or financial details. The document also contains numerous links to potentially compromised WordPress upload directories, indicating a pattern of exploiting public-facing applications to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://aldurra.ly/images-editeur/img/file/5992066278.pdf In PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/10699e2a17aa85781595371fde3add0f/52901471888.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a2b7ed661---80703259941.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/fubodasirutumujeres.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/2d9dc79996a0b865e27758e725d2b100/53238201000.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/13934537501.pdfIn PDF document text
    • http://heizler.hu/files/file/tovajowuvoliduwedit.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b4b656045---parexeluxumur.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d0e36d833---musazuguxe.pdfIn PDF document text
    • http://asvpp.fr/pdf/tebazokizuzenotipoxenupum.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/41ddeb827a4e4b0c5f9edad54b7bb071/34014826903.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/30769930231.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/29407000231.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/27296595463.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/73717955679.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6c3f13c405---dusijakujasur.pdfIn PDF document text
    • http://mths1965.com/clients/6/62/626de2090e8268457c7577d5e8b87900/File/58893653309.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/26233310626.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/41437799093.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/b83b75132f8934770f4243475d36588e/86524171331.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dde96d8e85c---42189645341.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/65376050849.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/50376136741.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be49aba8d98---jurobagajojujebijefunifa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+do+i+activate+my+verizon+prepaid+hotspotPDF 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_off000104e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E5 11052 bytes
SHA-256: deef88dbaa538b63068eb61b113061030a6a030add6a7d261a02aae15073d6ab
font_01_sfnt_off00011e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7C 17060 bytes
SHA-256: 8237327cea63cf534b243e2908d98949322cb8196b01936f4a6f07c5d3bd8e8b
font_02_sfnt_off00014b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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