Malicious PDF — malware analysis report

Static analysis result for SHA-256 521986cedfbf5346…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 10:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f45448ad9cd20504098626edb8b41427 SHA-1: 608f91acbad7d070b55f65c67c6bc0ad16e57f55 SHA-256: 521986cedfbf5346c202986b6d20ec7e9c56f123a97305adc7b434e4977d5df8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, such as http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703443e4858---53990086658.pdf, are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0f44a383e---zifimagumarumuxujirofaje.pdf In PDF document text
    • https://louvre.lv/res/wysiwyg/file/gitunavi.pdfIn PDF document text
    • https://magerp.org/upload/files/pebegifajevusazuxuv.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/36223369398.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/sajujodigelewibowusijun.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/sugizulajejibigagotegebur.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/jutofudoruj.pdfIn PDF document text
    • https://deepex.hu/hirek/files/bugiwazokofebevex.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/ruwatusi.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1641a97b4---lunasanad.pdfIn PDF document text
    • https://successalpha.team/upload/files/59448817916.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703443e4858---53990086658.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97b0be2b8---gigezeganimuxetowejiwu.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160cadf6a7f73d---gaxatodukifazesonera.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/es4fdr8psfhnod6htcaoma8f2g/35454392080.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///zasofuxije.pdfIn PDF document text
    • https://appfacile.it/file/48726808315.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/nfgdn7fsmsqji5an35b9l1abl7/fobokonajovubibunob.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210818152849_wvu4fd.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ac04a69e067---63716177208.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/pejujatozolitodijonadalem.pdfIn PDF document text
    • https://clove7.com/userfiles/file/baregopona.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/vibelekat.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/nexadadegodepufitadim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=converter+pdf+to+jpg+free+softwarePDF 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_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 17792 bytes
SHA-256: a01a4b3b03b106fb5a43a68e19f9f9f640db919149d9039ebde0a017a6426383
font_02_sfnt_off000121a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A7 10848 bytes
SHA-256: 69c8681be1e054715f26518f803c83f80397d5132f555d4712fecdd876a4e5d7

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