Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5855f51135bbf8…

MALICIOUS

PDF

68.4 KB Created: 2021-10-04 02:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e6b4a3edbb2cdc0b012858acc05ccdca SHA-1: d74f0aa5f7d3cb013a453cd4cddda90ab5b6cf28 SHA-256: 4d5855f51135bbf8edc9a9133380e07411ff93b2d5acaa6f0de0c54af03b9320
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to obscure the true malicious destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/2a89fdc01d3d85018cc4ec5c7f19af77/zigipowenujurumegupupimam.pdf In PDF document text
    • http://ozora.schaffsen.com/contents/file/gefali.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/76285705773.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/balevixoronitogitijew.pdfIn PDF document text
    • https://motoralbini.it/files/file/1798986563.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/katilanigekapemapivot.pdfIn PDF document text
    • http://esteel.my/userfiles/file/diwomunadutexikiref.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/tizafefozikame.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/zagokotopapojas.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/28275672032.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/biteturixun.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210901070509809.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/32243267092.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/givitewawururenematuxe.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/jokazasafulapa.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/93216316816.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/tuvorubedek.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/22711497339.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/pijisirumagowidikizuwaxen.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312caab7677---81530039428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=best+3+digit+lottery+numbersPDF 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_off0000ade8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE8 11008 bytes
SHA-256: 3444efad8f16efd060f8aed56c0900d36c81a69cf4f5ad812673916c74979e93
font_01_sfnt_off0000c753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC753 14540 bytes
SHA-256: 3ee195245755a2a3962f9ccf24c23feca2707eefe6e12005fcaab65ea5738491
font_02_sfnt_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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