Malicious PDF — malware analysis report

Static analysis result for SHA-256 801180d1694ec846…

MALICIOUS

PDF

80.1 KB Created: 2021-07-13 22:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a06172231c2c95fc450fa4f670cbfb3 SHA-1: ba4ab99c124e228d05b98109724d401e69737879 SHA-256: 801180d1694ec84689d6d5820224c4ca5a13494fff7eeb04a1dcd82657a9b3e0
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS upload storage or disposable hosting. This suggests the primary purpose is to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://alexanderkanevskyartistbiography.com/clientMedia/file/5771763053.pdf In PDF document text
    • https://clumba-indoor.ru/files/files/pukemukefupepakumi.pdfIn PDF document text
    • http://vhshf.de/File/vadumogul.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/zubakazivafu.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070d248a7d9b---rameworawarudi.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/rikesodidera.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff64989b02---variwudenududiz.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/q0t8129nsr3ab2bqi3ikokjha4/kopipufusam.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b1b8dc74b6f8bbf1db2cbe442e53b1bb/40907189114.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/46749392777.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098437425fff---nazumuduvuvoz.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/467ffcfc373495f64ef43c14c297e636/fijalasofasiwo.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba3322e503---16413815867.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/inidcqk2t6g86p73vl6uof21tf/rorilemotetusumo.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/bewikimusida.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/st3p6cbgtvtvjv1c8tjohaiopt/defulafubalexoxojerizir.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/mukizadu.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/3f2023b547b72626afbf82378ed6d59e/19118434243.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/81351091189.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/dccfe304de328f94b6f657333fb7df62/zoneb.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/b7ad8441e7dbd5577c80dead613e4938/jokiwamed.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160721ee6763a9---4225227274.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/2293984967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=c%23+logical+notPDF 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_off0000dd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD79 16904 bytes
SHA-256: 48ef406b5342fdcaf1604e4cbb35bdb1971fe181c91e7ab06c0eb7b68974638e
font_01_sfnt_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804
font_02_sfnt_off00011cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1