Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ade8ae7548f0f5…

MALICIOUS

PDF

86.3 KB Created: 2021-07-16 13:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3818d79937c243d611986fa4688ced46 SHA-1: 3c144111d2b946eac4bf7ec2e71a59185899520e SHA-256: d7ade8ae7548f0f556d02aa5d115912afbea743ac08a874bb64149486e153130
176 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the primary attack vector appears to be directing users to external, potentially malicious, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://abwcolley.com/uploads/files/87217982582.pdf In PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/i49s5h21dgm0ff5hpfti20ae9u/83879055576.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/54031663960.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609086da6f016---tagavoboladimutolop.pdfIn PDF document text
    • http://mastersequipments.com/ckfinder/userfiles/files/25507919969.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39ed0bcc3d---10506356053.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874bdc503d9---26800328405.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/womazuwof.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5206c45a1---witovidopijadorigutu.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/3946840810.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/nou6djcpr0u2hpo2mm9qdif2er/86560089166.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a90bc6bf6---9220974473.pdfPDF link annotation
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/zogulumomofukesivuxo.pdfIn PDF document text
    • http://proxima-design.cz/files/file/75802279512.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/31862599232.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/73632700032.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/48461618892.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/6h6aj4ki5gg4r4in0lam1r2nl6/rogotagutimur.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c85ad890d56---37535833393.pdfIn PDF document text
    • https://t2sc.me/userfiles/88619352330.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab17b58a6dc---69652714539.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/89439733482.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=rick+and+morty+s04e08+onlinePDF 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_off0000e507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 11192 bytes
SHA-256: 1e73e4c667e3b1ab51847f8f6275333c012e46dd43c94e85833882344298a849
font_01_sfnt_off0000ff4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11761 19968 bytes
SHA-256: 3dae6661a18130a1aeedab763ab7d11e9628387ff37868b56a489cda3f1609a9

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