Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6fd5453ad81c8d…

MALICIOUS

PDF

100.1 KB Created: 2021-08-22 04:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a58ed8f9abf4d3723f3abcaee43d4a6f SHA-1: 4bc796f162baf8b78720906de3a0681efa7ef4ca SHA-256: cc6fd5453ad81c8df0f9ca081538ce39e0f45f18b065097e086e0b453ce9d472
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://theprofitnesstrainers.com/userfiles/file/97751563245.pdf In PDF document text
    • http://jhdjt.com/images/upload/File/87346249060.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/604ud1u47g8nhngblca05sbqof/4537425943.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/98971281598.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/mewubosukavupovosebu.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6640dc96a7---fekubu.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/1d8acee9ba2496d63beda9c6feefb820/tapanigobagowegititofite.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/3ec8c0efc9039c8293628723c1a739bc/mexegafeverodexupix.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612061ebcb603---nugezamesasisobo.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/1f5f77ddbc118c2134cbd263ca4ace19/gujuvodubuvoxifakudeb.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16085559d8243b---fuxugojexarodavo.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/59390298151.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/13642492100.pdfIn PDF document text
    • http://naturpix.ch/cmsimages/file/domunakuredasomatajasap.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/disikeriwimafovafosu.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/96485386623.pdfIn PDF document text
    • http://kidneytexas.org/clients/861060/File/64953744208.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/30685967402.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/49238574238.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/rogamevofozowonimilojox.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/ruzajijejugagax.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5bfc9aa96---28010916589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=the+babysitter+2017+full+movie+hindiPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA4 18928 bytes
SHA-256: 8191360f181aadc072632f9f8bc6c0e0355be1bb21795654a9dac163d10207f2
font_01_sfnt_off0000fd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 26320 bytes
SHA-256: 0bfa2f0856e538d55daf4a261ef192da4f911c8a52968c268c47590af3438cd5
font_02_sfnt_off00013906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13906 9360 bytes
SHA-256: aaf1bfc0475c1e36c6b7f5d48a5f782a227e92f4277aadaf466cdf46318f872c
font_03_sfnt_off00014d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D13 11348 bytes
SHA-256: 6de0827bbbb3ce254431724e09b02ba1ec5098f9c684140e369d2a4f38fd95dc
font_04_sfnt_off000167c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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