Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e3f1394638792d…

MALICIOUS

PDF

79.8 KB Created: 2021-09-03 04:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 636702a3ce4c47f0a1680befe7d2d8b7 SHA-1: 5fa24086507718b37ed66ab1bbfcd53a83665d47 SHA-256: 46e3f1394638792db60bbb108d16b50f55c806647a3349dde8d1d6471f1dfdc1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute further malicious content. The presence of multiple external URIs and a link farm on disposable hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/qogaamgcr4r5k0vard1ckdmhts/40607559304.pdf In PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/s6krtp9tc0dk7vv4tukhtfrjcf/35417430659.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099223075985---15848648810.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4988ba3a9---63411325488.pdfIn PDF document text
    • http://srutimusic.org/userfiles/file/xemajugej.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/tomijumifuki.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868bb9319c6---17096535878.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/b8d1b1449c22556bff29112d1c84fc6e/96971696101.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fef0e88762---66389083099.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/pt01mdutvqmurocvcooeu7k0uk/64838632206.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad34de55370---xazenoteko.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/nabovanamalubumugogijese.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/497dccc6eb625a09d0e42b39165b2fd3/82502355122.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/91026127278.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/46318558575.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/bisewopugezavixadapokex.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/xunotevobavabozirexusavi.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/98900684878.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/69639558324.pdfIn PDF document text
    • http://imaginove.eu/data/Files/lavisad.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/f25ce7c94192b10b5ea7d46e0cdda413/85313435228.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/rivugepegomeku.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/kafaridera.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/f7r3ilem63ch81d0a2n5as9ojj/datof.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/97012044368.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ej211b3e5jj5s832gmqi0f2qeq/dikuwutusuwafigojow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=matrix+objective+questions+and+answers+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_off0000d187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD187 17532 bytes
SHA-256: dca88859da2093a8053e538a32a70d2fbb699281d61437cb89801620368deeec
font_01_sfnt_off0000fee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 11332 bytes
SHA-256: 78b9e1d7087933dbcf89dab2428a3f936d5836016308a8cfd4ca239707c4690e
font_02_sfnt_off0001195c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1