Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa03991656629885…

MALICIOUS

PDF

78.0 KB Created: 2021-09-08 04:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e19159068d817a69ac9493411eee6bf1 SHA-1: 7205360119146d3e053e55a5a22154984d0d9652 SHA-256: fa03991656629885322d37252cce89368319b23253ed9cf2485727d06fd03851
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable domains, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm, combined with the nature of the linked URLs, points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://allytemp.ru/uplcv?utm_term=edema+aguda+pulmonar+pdf PDF link annotation
    • https://adikkedua.com/contents//files/dasopevapepewot.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098781c0125d---polopejibokokoki.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16077d8e96088e---66976427989.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/9a35a3284207b4f74e9c5a53075f2a0b/gogazo.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/muoaaa50nl6to5mnq4p6laf296/tepowemugoridijusoliwamom.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/mofotezupejubir.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49b7a85c07---doxisi.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/4892200738.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/silukutofivanunidekipawes.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/86820963268.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/sakonukowipemoge.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0cdd92d8---93027627656.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef4f7cf74c---38065428635.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/a51d6928a7d17b1943ca96cc6e3fc23f/keruzirotepanixofaw.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/pezofisupisipinege.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/15847267889.pdfIn PDF document text
    • https://triosms.com/userfiles/file/votitexesasopipetagedi.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/74926807890.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/49115099087.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/xutofedizaxulavusurodeb.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/lorisi.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/21236115075.pdfIn PDF document text
    • 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_off0000c8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C6 10564 bytes
SHA-256: e4032d404bbb9fcf1cc6d6782cdbde88ee83702b04d2a73fe4e3ab892e324f25
font_01_sfnt_off0000e091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE091 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A3 19472 bytes
SHA-256: 6b6ebbdc2d211d909365f442531503085c0abc97b159a7a9517592c69fcd482b

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