Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce79827924f6c0ec…

MALICIOUS

PDF

85.4 KB Created: 2021-08-04 22:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6869f4e0e1d9473aa2bea1267cd0c240 SHA-1: 4332039f31315a5f08a3567273f355e8ed0258a3 SHA-256: ce79827924f6c0ec8ce9ec5f0c44157b153b820cfee7069490ee37ddcad8064e
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 contains a link farm with numerous URLs pointing to PDF files hosted on compromised WordPress sites. The presence of these links suggests an attempt to manipulate search engine results or distribute further malicious content, aligning with phishing or SEO poisoning tactics. No scripts were extracted from this sample.

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://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/8l791fajtfci12vl0bp4udug6u/2440191684.pdf
    • http://dallapietamarchisio.it/userfiles/files/37994078115.pdf
    • http://familiehollander.nl/images/uploadedimages/file/rulisu.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/10j5fp795jd0rf4knvegl5qveq/peziko.pdf
    • http://re-view.online/fckFiles/file/76372556468.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8fe4ba6ba---91700774306.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a058e75b2---sopulofukanozekeb.pdf
    • https://vhssirimpanam.org/ckfinder/userfiles/files/mimonewenenerakezox.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d884d2aa40---poxoletirol.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba8805b33---gikegojujoxoki.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/hskmcma992hg1nqg7jg8tsd4ag/jelebuxafupa.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aef58f021b---senawevuvagezisobunaliko.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccc14cfbac---88883608440.pdf
    • http://nakajima-ya.com/upload/save_image/files/giguzutujem.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/47cb98kcvkl4dqfso3050dp312/37573998311.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16090b84d5655a---83105709004.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b33d445f2---gigozunapo.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ef997127e---xewatufubevimipixexuter.pdf
    • https://vayamcs.com/content_files/files/37840394022.pdf
    • http://amadpich.com/userfiles/file/61775557148.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075167737ae5---wupobanevoxumareb.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a543d5d6f9f---52045605207.pdf
    • http://anticacarsulaeborzoi.eu/userfiles/files/95324424351.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108b11e54d17---91211318960.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+make+10+secret+rooms+in+minecraft
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae5.bin
d13574be432193e2940b2db4b6fbff3d2a57dc0d8f95c311ee5109292c294bd9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 10796 bytes
font_01_sfnt_off000103d6.bin
c945524f4bbf4bbda8695dc12121564e5c9ab324a650517b9bd21165651e1543
pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 16828 bytes
font_02_sfnt_off00012f94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F94 16792 bytes