Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f16e180ac236414…

MALICIOUS

PDF

91.1 KB Created: 2021-07-05 02:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aace1c5a3608c82838ac0582c926f797 SHA-1: 5470d6032c0b15358be7c9a2fe5dabf9e3e18a3a SHA-256: 2f16e180ac236414c78cb45290f19978f7ad7e321d0123e3404159920ab8b6f9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content or for SEO manipulation. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/67bf48d3adc8b7385fd82f944acc1d3f/nibiwajezixeboxat.pdf In PDF document text
    • https://soudurelausiere.ca/upload/editor/file/84523757685.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tdd1uvb2utj9fqto7et4tuudg2/91500407018.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3b522baee---junusajesijodidide.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b96435929641e1c01c286f10561b4d0c/73706388475.pdfIn PDF document text
    • http://homeopathyhongkong.com/files/xixujiliborasebiro.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/99971043769.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/bifemenamukipagitidi.pdfIn PDF document text
    • http://bucketdiaries.com/uploads/files/88795044326.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/pabupixamifonurata.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/79795194532.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/51638196061.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/21cd39b62f85672e38e7fed38d5e2d0c/davekedoxibidegojobix.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/4s37cnhn705m5ghsmshst85mo3/17006655098.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/986640599a47ce315a7550c98a0aa8f8/sikulogadegumom.pdfIn PDF document text
    • http://berbun.com/user_img/file/kaxosefuduwedunolos.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609861235697e---givajoxubumoteb.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b103f0c823c---96076605579.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609475a2815d5---zilivaluwaguwakudidekejiv.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/nufudovel.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/kafevizajakiwivegan.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/duvesebafigebip.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/xesovitipemerinore.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/gewutizativado.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/kusenuw.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160975aebab0ab---jafujibonotosonaw.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/49883714272.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=spider+man+head+drawingPDF 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_off00010556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6D 10568 bytes
SHA-256: fd178b2ae940fa27902ccb82ba64d27f57f56dec4c9c1b0a1b2af71e6c4ddba3
font_02_sfnt_off0001351b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351B 16388 bytes
SHA-256: 8ea05eced132268b790d8f2492292c4b60e443eaab981e3e7d2b9ecba807d268