Malicious PDF — malware analysis report

Static analysis result for SHA-256 692e221074529b43…

MALICIOUS

PDF

68.1 KB Created: 2021-09-29 07:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d59f7e1a874ee1cbdedf2d73c56d4f98 SHA-1: 93dddac8c8fbb1c318776b56c5273ba22bba8a4a SHA-256: 692e221074529b434bbd9f9715e50c3135e5ad5494259a727eebb7e91ee29086
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://sportyou.fr/ckfinder/userfiles/files/88647129569.pdf In PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/vk4cbm1p2jc63pjsrm3p11fup0/4562938442.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/zupipujakuzizosuzev.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/zezimozamizutobag.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/nobemukax.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/55378191880.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/57958460030.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614139b72a266---93364681302.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/42947683471.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/peridiwodarejatuwezol.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/a32dd0b342cb4a133e2a688791b2f4ac/57968930053.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/26152049835.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/24663226481.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/sekowikeripagon.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/safofimoli.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/benilakek.pdfIn PDF document text
    • http://adatarimhayvancilik.com/Images/Media/files/50574403592.pdfIn PDF document text
    • http://cmtsport.com/pliki/22461440598.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/99608149783.pdfIn PDF document text
    • http://iknow.pl/files/file/mofexawojabojejov.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/bebud.pdfIn PDF document text
    • https://ccskin.com/geektic/files/bisigidamaduzalezuxegifif.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/fafiloputiwidu.pdfIn PDF document text
    • https://clickbox.ro/images/file/1827589236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=game+android+2012PDF 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_off0000ae86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE86 10432 bytes
SHA-256: 63144dd182ba258a2037acb75968ab0b2c29178a228969d8ee28c59e33cf1be8
font_01_sfnt_off0000c625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC625 14664 bytes
SHA-256: 3b5e477d12fd6ea5d7054468ad3145c1fb395e98d706f05ec6ce1d3c65316e22
font_02_sfnt_off0000eb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1