Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd9b291f2e9cf0b…

MALICIOUS

PDF

93.5 KB Created: 2021-08-05 16:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0c7c06dbb9404af3d74c22793309051c SHA-1: 75bc39aff80d77b836808122ce756c6752b647d6 SHA-256: bdd9b291f2e9cf0bee60dfd291d4139f8b036a5780754d7b27e9cba390888e78
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=how+to+look+up+someone%27s+sentence+in+jail PDF link annotation
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e60fd44bf00---sevururevofasawule.pdfIn PDF document text
    • https://bagstyle.uz/images/file/91454000193.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/91516733264.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/rokavuboduwixiw.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/fibewusorepudo.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099cbc6d78e3---wiramigenezisaluj.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/22980970449.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/garasamufuzuwibuxu.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a17512eb8---nebutipinozulixolofupe.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c3dd5adcde5---33507001988.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/roluxaxelu.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/40472339937.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60d1407868---57708202033.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607084419e839---39080245100.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d89417ea448---wujaj.pdfIn PDF document text
    • https://x-software.cz/data/file/80829414672.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/fawetipojelowox.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rigapakip.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/dc474c32004572959a30c101df94aa10/53483041662.pdfIn PDF document text
    • http://axwelindia.com/uploads/zifanow.pdfIn PDF document text
    • http://plncse.hu/php_data/file/78503606261.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/8975053866.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_off00010b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B61 10868 bytes
SHA-256: 170323c35bb142bc9bcafd9d32a691ec20e21a3b6a0d81acfc7652f708b4c22b
font_01_sfnt_off00012481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12481 16668 bytes
SHA-256: 9427b193529ef825b14a395cbe7f333d4800b91711d30d005ce4f3e350ce7793
font_02_sfnt_off00014faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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