Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2e3c5dbed07241…

MALICIOUS

PDF

69.5 KB Created: 2021-09-03 01:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ae05ba0bdd07dbe3bfffadae212aa38b SHA-1: e3a5e25e465ee17df2777c27024ca7c04b0c29ed SHA-256: 9f2e3c5dbed07241a8ff53acdb9ca88f8e7e0dce403c89a22dabb509abe02bda
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. Multiple heuristics indicate the PDF is part of a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving redirection to malicious sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aba5647b41a---tizid.pdf In PDF document text
    • http://gold-carsales.com/js/upload/files/lulewolexajosedupok.pdfIn PDF document text
    • http://learningkey.org/userfiles/91323955305.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff57b07b77---fuvovebebomezoda.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/58229096445.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e538ec6797---38595999990.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/0419db16268ba2c7f33d1d255efd0a71/mejamaka.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f7d8da81---57282316858.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a3cb5dcfcb52c202eaf7183d6da96bc/juxugilivutukavikazezafis.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a37ee52b5---nokafowid.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/zemuvifabewatupe.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/34049035467.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/voxazulinumajavu.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102d69725eab---79758123669.pdfIn PDF document text
    • http://centrons.com/uploaded/file/20218286660dd764c475e6.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/63709513763.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/vorinupagewusubobunenegi.pdfIn PDF document text
    • http://thietbixanh.net/uploads/files/jerodemaje.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/busubodagebepujidamesikaj.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8bfe44a40---kazaxalawuj.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/8f8e7e9d6eefb7969bf01d755fccd9b8/rinimege.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/debeta.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/fidazilifusufisopavezonu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=joanna+soh+meal+plan+pdfPDF 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_off0000b41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41D 10464 bytes
SHA-256: 0c35d6d741a8b87eb2279bc824d3fc3710dbea45953aacdbc1d6e92a9dfa769e
font_01_sfnt_off0000cba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA6 14640 bytes
SHA-256: 4dc8afc6b79a741a34df57dae388899057a4c0b6e9507e464d760a4bd26eadea
font_02_sfnt_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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