Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e70e452dd2a1aa…

MALICIOUS

PDF

87.2 KB Created: 2021-06-25 17:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f622d8a62462df7f0061ad0008a611fa SHA-1: 84a3da641e53ed3c72c02ce34646558943fa8927 SHA-256: 66e70e452dd2a1aac5069a71c9cc8019a2a55908f6428ba1d8806bf07f30653f
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://archism.ru/uplcv?utm_term=columbo+short+fuse+watch+online PDF link annotation
    • https://galerieportelouise.be/userfiles/files/newuforetuwu.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/sekevomatikux.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/22591128099.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/jfbil9k0k8qnue4nhmhirudv1f/91874645890.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ca000151b06---39055763268.pdfIn PDF document text
    • http://sumterhigh89.com/clients/863574/File/mezimumurafowepasumorulod.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/efca76045f9a2b3f1e85ba48ea882069/xipiveso.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/900983414f5f65cb804077e57d01a165/35986651926.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/360235b017695f8f7af6c274a4998a6a/71750090796.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9d784c61a4cf70d30c28b5e92acd3bf6/75934049308.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/d1a416e54d46d862d36dea760010da2f/wopusofovamukunojivubimi.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/dutopelumilupenu.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/puselisebejuwupux.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/68406825086.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/xekolagozuvaxud.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16097339d7856e---23670798339.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609038c1e637e---fokawafafamikusaxesos.pdfIn PDF document text
    • http://alumnicollegedelunion.org/clients/76066/File/62754170585.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c67d050b624---81395520889.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/mabefanivosam.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/60638165363.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/j298aov0d9arbfjn7cknjmmbqq/95428992011.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10477 18320 bytes
SHA-256: 0ed2a08cbb4138b60ba57b7f46c93e693a53e74b6bd134d8976871d2985353fe
font_02_sfnt_off000134c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C9 10956 bytes
SHA-256: b264d13b20ff463bb10cd96e50a012ffae5eba6f566da85fbaa6969b79b06004

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