Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cc07beb8e9e38e…

MALICIOUS

PDF

73.0 KB Created: 2021-09-25 17:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0c83a183db2eae9eba1e0ec13b6a2816 SHA-1: b09c1bf88fea764b77043305679ae58cdd9a0c20 SHA-256: c2cc07beb8e9e38e572936b348c164b5bfa12280a4e63336c55c9259bc78b4b4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://catamma.ru/uplcv?utm_term=how+do+i+update+my+phone%27s+operating+system PDF link annotation
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397a01ec7ef---57145422751.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/96d205d1f193f6df0d2dad6fe4c671c4/tokose.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/gixonewo.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/tifanatitovijedesilaso.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/8811247654.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/88056147962.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f95d2fc6b48c56d8d839994950774e5/47854273121.pdfIn PDF document text
    • http://slipa.site/0429/upload/files/nokuw.pdfIn PDF document text
    • http://goghepcacloai.com/media/ftp/file/207262398.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/simunetezorara.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/mevupurafitavamovoparezo.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/lijuvarumufejulur.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/firidazafite.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/88604433462.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pogugawabudok.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/tabenuk.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/9308055270.pdfIn PDF document text
    • http://showdoimovel.com/files/files/38413707720.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/43945212991.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/dukesuvimidodabuwo.pdfIn PDF document text
    • http://ranchobg.com/img/file/tuwebid.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/72567176433.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E1 11120 bytes
SHA-256: 2b9ea0f46f63b333896ca4198592679c5543dc3589b826d6abd168ff46d8722c
font_01_sfnt_off0000ce8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8B 18856 bytes
SHA-256: 0cc919d0ea1d57ef92c253b2486615838d333717bd2e47b606fc1a0285cbebab
font_02_sfnt_off0000fe56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1