Malicious PDF — malware analysis report

Static analysis result for SHA-256 19eb1afa83ee3747…

MALICIOUS

PDF

89.8 KB Created: 2021-09-02 02:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 75f1afef3acfafd167242f23571f22d9 SHA-1: 7de7edbcec65407342ba5e1070452403e0c94b39 SHA-256: 19eb1afa83ee37474f55d1024815fdfdbff563ab150eeb3877895945b6c0e769
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/558c8a6b9f94fc9f0fe5cc263d6e7957/woraxipovuxezatubipimupu.pdf In PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/mhmocsjl2ueru8n65scsdqfab1/bofidipipafabozus.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/19443154917.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecca12d3359---2315344262.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/37834996140.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/83159807642.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/27983489969.pdfIn PDF document text
    • http://xn--om2b25zm6igqb.com/ckupload/files/revumefimeg.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/e79458d1fdb9ae6e311ca10af72920ad/40573200187.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/58820678243.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610ecc62b5805---93177979637.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c13d0e62d---mexopusa.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613001fe8b958---39857827434.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/derudazozafogikexo.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/c884381b9d28d00b5dbb55c775e84f64/fagafazu.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68460113792.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/26870491258.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/84649765296.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/vudepowabanure.pdfIn PDF document text
    • https://brakos.it/file/10063710877.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/0706pdk9nngdsvs9e36dnatka5/nijaw.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/j0gr40jlk3jr6vltkrij6mgt83/97013085532.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/wajuxosa.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b094d35c164---zomuwome.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dce135320f---59001507743.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160864883a465a---nomisa.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/8187bf30ae1c465102fa01212ee23da2/29003154801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=two+and+three+dimensional+artPDF 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_off0000f736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 19188 bytes
SHA-256: 011c294f7ea5f3f760da988b4e31f9965c5312c729badb9d8ff7f2d4f443d83d
font_01_sfnt_off0001295f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14176 10564 bytes
SHA-256: c2a21025734a8bf951ac2a87f9651a484c4c4ad9e92d8526c8c311ee566a23e7

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