Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9afa6b01a4a5af5…

MALICIOUS

PDF

72.7 KB Created: 2021-09-19 01:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 01246797aab2d121dd5e98f2dc37a2ed SHA-1: e32f2ca3ae1d3957c8c180ec93a55171e77f93f0 SHA-256: c9afa6b01a4a5af5fe59868186d2171add603af66268f4a0ef93abd532d8e22d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to domains flagged as link farms or hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://podhoru.cz/userfiles/file/xoketakiloraleboruduxegax.pdf In PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53222968630.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/kakiburinu.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2db7513bfbbd88a744e1ceb006fc02a1/dimujukukomepumex.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/35905615972.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/24773067612.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/libisewofuxagemonawogo.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/35575987553.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/dc0ed7f88a6b5a5979978b611b781ec8/jeduwajal.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/vabubugenirixomigutit.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091905484938.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/1233812289.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/zasovojule.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/wosuxonevirabasuxozo.pdfIn PDF document text
    • http://sql110.com/pic/76687304590.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613df6b84bd83---51736072824.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/79vgm8mfilkm69ovtegvpkal47/13365962635.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/81310004671.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/pigavapidenizefaluti.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/pbc9pbqlo752g9m73hcp4qs1vk/91207154459.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/wokizaxuvevorop.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210908_ECDB95F2590FB6D4.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/35092893617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=calculator+vault+app+lock+hide+photo+pro+apk+downloadPDF 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_off0000bb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB08 15988 bytes
SHA-256: fd8864bc397e6c861a3530244a1a7dcc2187b332608541eebe9bc2a23206ff22
font_01_sfnt_off0000e3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AF 10816 bytes
SHA-256: c921a367023ca220f7aff6fefa81580af0bd9cf3e203526d3c09706f50a13721
font_02_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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