Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96b6fc3df7db5f5…

MALICIOUS

PDF

88.3 KB Created: 2021-09-15 21:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b5d22136fd85f8c3ab4e16241fc3ef27 SHA-1: 0cf96bcdcfafa09317d3766df3fd21a8937fad00 SHA-256: e96b6fc3df7db5f58783fe3b7e7bef0dd343cbed8ae2ad079e4b91f4dfcd04c0
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://leganordavigliana.it/uploads/file/kifegigi.pdf In PDF document text
    • http://nhac.ditimchanly.org/Images_upload/files/kejaxuzurexu.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/lodl5p3erdett3mgoen0enuubt/lekafujagolikubixik.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/gafokuxite.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/meredufejuvepibemawisavan.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/geditojenevusisobevupere.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/jaxajusagefu.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/nuzakakinexinorufometukag.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/gabafow.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/zatakufubufosi.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210909232915.pdfIn PDF document text
    • https://franciscovalles.comtraining.cl/userfiles/files/95519555211.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/velamefetafumimilupuxixin.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba58e21d88---94758425817.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/xevuvaraketakitebupom.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/zomafufovapelibagewi.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/73285546763.pdfIn PDF document text
    • http://clingac.com/d/files/7234392746.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/83604019541.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/wevanaresim.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/93516194150.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/88266216302.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/a236b76cceaba5ca03d1d5d89c9ceebc/fivuvun.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/zapirisi.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/perilubalodepegaji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=watch+spiral+from+the+book+of+saw+2021+onlinePDF 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_off0000f15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15B 18284 bytes
SHA-256: ffd1dc1e7cb7ab7eea6912690207b8b29d9d56d38faf0a9692eb8f2491518cfa
font_01_sfnt_off000120e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 11348 bytes
SHA-256: 59149bd627470d8a9329d81d6f7e3c7eaf841b113350584b5953df6075898474
font_02_sfnt_off00013b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.