Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7b669ba58827f7…

MALICIOUS

PDF

85.7 KB Created: 2021-09-15 06:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 94e2fd5da136f3deda7ee52e5ecada95 SHA-1: b5b707100ce343c563040d1d954163b262358e11 SHA-256: fc7b669ba58827f77a5cc676c600786be61c5b5dc828baee06638a2812a96616
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many hosted on disposable domains or compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document likely prompts the user to install a fake browser update or extension, a common tactic for credential theft or malware delivery. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 https://drafthe.ru/uplcv?utm_term=disable+most+visited+chrome+android PDF link annotation
    • http://crisismobile.com/ckfinder/userfiles/files/nukijewabigijolanafidavu.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents/files/mimuzawobesek.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614040003129d---57386754662.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/37421770248.pdfIn PDF document text
    • https://premium-house.uz/images/file/lurerununi.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/golefode.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/26732391492.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/15568279865.pdfIn PDF document text
    • http://chinalabware.es/d/files/volaresesali.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f05350326---62305419337.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/p1euc4e7j1sjp2oilkraej80m8/84788180623.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/pisosob.pdfIn PDF document text
    • http://oris-am.com/editor_up/13852770238.pdfIn PDF document text
    • http://kccmaul.com/files/files/lononatiporo.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/xabojaga.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/sipewugupawa.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/iamam4uarm2ms65458kiboofpv/19125849462.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/xoxoxum.pdfIn PDF document text
    • http://rayanchem.com/d/files/zuvixoliwujakuwawejer.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/9936169436.pdfIn PDF document text
    • http://idroter.org/userfiles/files/56285009972.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/84167840933.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/3752055858.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/82862210453.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_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 19212 bytes
SHA-256: 28644a0fa6bd8870869640b49933e23510898f1e658b07fe8bcd05fd29748e99
font_02_sfnt_off00013021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13021 10844 bytes
SHA-256: 9111af110846e64db529d745beb45ab87c8302789def6bde6e0fa57bc29636ac

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