Malicious PDF — malware analysis report

Static analysis result for SHA-256 783886fd52558248…

MALICIOUS

PDF

82.1 KB Created: 2021-09-04 18:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 75b6a09942202d9ac7f379f6e9e50adf SHA-1: 177bccacb8c450a50d8c01d011875c376efb509b SHA-256: 783886fd52558248ad331f56473ae6fe25bb60db0e4e9d2219874d06b913f735
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9061b8f742a7ae3f20726130ac6836f9/vejaxozomafod.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860a95946a4---7202543901.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/goluguvorikofadovi.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/57356398105.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/60627322693.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/nofividagikajuwitiso.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/malasufukux.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608723f62cb17---10470789467.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/92ed7a951400e493998d567451d893d1/pawaxogosenowubef.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/4923980701.pdfIn PDF document text
    • http://www.centralperdana.com/file/21955412532.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/vikiju.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/29838598423.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/fikitekif.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/grbtami9pr38bbhfjj26sel696/69153167986.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161315ece00fb4---77675037594.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/e23f13330248d74222fa2903b3d6b5cf/fitabetemuzaxeno.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/8134066db1248f1fca7de153e351e1de/80300822469.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/64279838494.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/91289751646.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/47989478809.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/ii59k3r5v7s4aqqh09s9r02qtm/dakitutigixivegipoxabebej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=year+2+maths+symmetry+worksheetsPDF 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_off0000db7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7F 17652 bytes
SHA-256: 065d45d9641c5de2ccb18a8d1baa38305eb6a7575945bd1443da89bbb3f0073c
font_01_sfnt_off00010942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 10524 bytes
SHA-256: 59e506dcbe6bf33a4d29029802681cbfb576566de01beedf38550f77a60aa0d1
font_02_sfnt_off0001216b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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