Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf444d889f2441c…

MALICIOUS

PDF

68.7 KB Created: 2021-09-18 07:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ce4280cfa5305a51eb95499333cafd6f SHA-1: 572747bd96be0eee891b91bba832dd8d03c29d9b SHA-256: 3bf444d889f2441cd40dfebaf329a2db036a1d3e30edaf7f11a873683f035c70
176 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a screenshot disguised as a document, with a clickable action that redirects to a compromised WordPress site. The presence of numerous links to various domains, many of which appear to be disposable or compromised, suggests an attempt to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://rzfmuhasebe.com/userfiles/file/gudokotemamo.pdf In PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/9069636315.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210901_040822.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202197446564448.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/buradatavamadirasoxulok.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/96582535138.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/mejupuruxeded.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/zikuvusigo.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/tebedejetadimuzazewerek.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5f20e8c23---20174643639.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/gevagifizesoremipavapa.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/sujilekoxod.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/48067815780.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/5241045917.pdfIn PDF document text
    • http://bdnchem.com/upload/files/xugepuzupejokewinu.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/96805117755.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/petovufa.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139de4f5bb8f---18815931723.pdfIn PDF document text
    • https://salonrewards.ca/images/file/gagirisex.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/95743810105.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/072f2c61a5f50c5a9a195cfeca9fe734/pagelorebigimapijulilo.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/jugegevetafaxa.pdfIn PDF document text
    • https://dm288.com/slicice/file/wasagopipazegezugamuvi.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/wejifasasezepinigiditat.pdfIn PDF document text
    • http://moneymaker-gold.de/files/renenuparuv.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/84272092936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=amino+acid+structure+testPDF 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_off0000b23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23A 14172 bytes
SHA-256: 9d3446fb38d9e028eee3d2430e2658bd5dd7fa3dda02490552b427d291018a17
font_01_sfnt_off0000d51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51A 10564 bytes
SHA-256: 908c76dbfe841dd7457b794510b45bab39592fb0243695ad2ec553827f1a5dd7
font_02_sfnt_off0000ed3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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