Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fa0791a1860981…

MALICIOUS

PDF

78.1 KB Created: 2021-07-06 14:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0a81c95437397f2eb1d45b56145c1dd4 SHA-1: cafff9447f281e0d16911961dd1c4d96e6839721 SHA-256: 60fa0791a1860981a32fcafff31f50960ca5601821a19fc749b964aa96535a7e
172 Risk Score

Malware Insights

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

The sample contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, possibly related to exploiting PDF vulnerabilities to execute code or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://tsutae-f.com/js/upload/files/17819729050.pdf In PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/56025942948.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/0ff459e760f030e031f9a68db5bcf132/boxasonepaxegubol.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b02e83498e9---kikolopusikagazagazed.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/gesodupa.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d8abd9262---topixejaborakimazipigeben.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/muwomoniwexosofefumo.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/99ae6b9682c21049139be35fc66c8fa0/55550339430.pdfIn PDF document text
    • http://yuha.be/_files/file/98538199875.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/998af2267fce713c8bbec9a60b831c4d/20738312049.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcf1beb31b---pimalojipolutujefoko.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/a9e97faf98490986b01385ea2187675d/10762967369.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/53c50c8138e5e786044b8d965433e2d9/wexuso.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/2fc1937d43b08185fb699fd99402e8e0/16198849350.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/9e13450915dae3a3f1138efda0f7545a/tuwopum.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6ab8eceef---85534059604.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d38592a9db57da378cea2cee8691f62e/91893567413.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/qgtgd5e7cn4vdl12tk0p1h30l8/xutajagemiwebafuwozemuwog.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/8144095306.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/9ujbtueqf0qncg6gl3iqaugc4b/zarujubufisezu.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fdee75214---4696881141.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/0e817cc853e44d52fe80322a918b3229/lotiwoburabevixezuw.pdfIn PDF document text
    • http://accronline.com/userfiles/file/gawebato.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/55f2deb5c5b902c949b68285dcca03f0/44306137842.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/57388849867.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pdf+permutation+and+combinationPDF 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_off0000c9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EA 10808 bytes
SHA-256: 3dcd7d5eb726b5c96b440deb1fcc9eaa75d584cbf0d1a9a05a39fe7297c6a2e6
font_01_sfnt_off0000e292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE292 18464 bytes
SHA-256: 8039f5177de482e7aa61e079089c7f455ccacc81a4c5dbbf3cfa772a22d7e021
font_02_sfnt_off00011147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11147 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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