Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e54bb7c60bda3c4…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 15:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 970ff5789c65e1b91dd76e8cdf4be735 SHA-1: 34321c3f8f2a5b2b10a1903b7c8c071a93426ee2 SHA-256: 3e54bb7c60bda3c4583c1e12ff95fb805de3956f26b018847156f843c2d9cb6b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://avgdesign.com/userfiles/file/50572697755.pdf In PDF document text
    • https://profitaler.com/UserFiles/file/20225731558.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9a01cc0f5---62970475959.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/62377308878.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e484d8ab7a7b1233852a8ddc8070746/gobagiva.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/rukize.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/lagadotaferiva.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/6knb956g2vdlj1ub4jfo6t85b7/30993948920.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c84adca55e---28483964032.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/97372187215.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/51436578637.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/up6vckgf7sr9tgub8hj5ioecam/92115835604.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/83598718697.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/35cba7b33c05a34727890654b6ab92aa/95805257291.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/56124576956.pdfIn PDF document text
    • https://proxus.nl/file/29750663387.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/luradam.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/d5ddeb86ec3516d990d41f754b257fcd/16307411212.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/1f5173d5cf24d8064620bd3b12d9d2bc/46829763068.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/lategomubuwejupewima.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/borivafinisoxuw.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/lazawutegivikakamalakos.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/59106810755.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/d48a5770dab70532504c6e862781cc3a/12129426566.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9cf6b1fa25b419cef3c4870a74c80cfe/6730013895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=value+stream+mapping+vsm+pdfPDF 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_off0000dd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD57 18064 bytes
SHA-256: 7b76b74f159bbf97eabb05222e6c1e1f52ee4f1002e64484a27591f9932dc611
font_01_sfnt_off00010c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0D 10856 bytes
SHA-256: c381fb3f47261435740e0694042e85fc1ce730daa3607e9d13625fe0eb64a7d8
font_02_sfnt_off000124ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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