Malicious PDF — malware analysis report

Static analysis result for SHA-256 62368a054c3a0ae3…

MALICIOUS

PDF

85.3 KB Created: 2021-07-17 04:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 95f9d8ad01041b2a0d6196f23cc664b1 SHA-1: c4a6498b0f9ed6d95721f5efa33ffedd1a3b2f31 SHA-256: 62368a054c3a0ae3a3179001bb8bf56045e1448e16e8b03aab8deee850bf3edd
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites. These URLs are likely intended to lure users to malicious websites for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/bdf571cadc9c350170f5f7b7d3574871/zejoxis.pdf In PDF document text
    • https://advance-pack.com/editor_upload/file/64325365518.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/58122253557.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60E55E489378C.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/h1qsdp3qim7mm8nb0446db2l88/nugesiruseradil.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160798eaaee958---vebaporotesusez.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ddlk1bq17um2s83bslsmahegg6/97284797307.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/17fabc9540bb1fc8c2a1cbcdbaebe88d/94784389769.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/jevibo.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f05c6ee0a---48239341241.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/30a98ae8eee45baeb99f1d8581068ded/gawufezetadonabufotubojal.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705efa50180---85273648928.pdfIn PDF document text
    • https://studiorampinelli.com/file/gewumuleja.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56aff04c01---funoragikupapi.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/lamededusexogokuwiru.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/xugit.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/zezokogabax.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ea66041f0---bugasij.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/xamofuwiv.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc48446797---43172469155.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e97e11be52153d01927d050742ec4c09/45583307984.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=job+rejection+templatePDF 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_off0000eb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9E 10628 bytes
SHA-256: 61d381b6d8072eb15e3472e8c581a8c93cb661dbf7b502a9ab2c0635bc9d22f4
font_01_sfnt_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 17032 bytes
SHA-256: 34ebb7d62d5ec3853e27eebaed45e5bd6d6f5807adf8c541735e32d0290ec82d
font_02_sfnt_off00013032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13032 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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