Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a45cf3118f5773…

MALICIOUS

PDF

80.9 KB Created: 2021-09-12 12:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 82be362ec443ad44fb02f8beab0ce540 SHA-1: d6122b0fbcaa38588bac23dc88f2e18c566c254b SHA-256: 37a45cf3118f577309ed073f6323bceb54cf1d0f60eddb9204766501fa005294
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various domains, many of which are identified as link farms on disposable hosting or compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/uplcv?utm_term=ghd+sports+for+windows PDF link annotation
    • http://abwsalisbury.com/uploads/files/mizawonorutosem.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd64a3b903---jetovuz.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/48488455158.pdfIn PDF document text
    • https://path.mn/userfiles/files/tuladunakeliji.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/zafeluwomes.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/40974933905.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/43241459798.pdfIn PDF document text
    • https://goodline.by/userfiles/file/rerotarowivavomamaf.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109010458046194.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/73782298907.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ada92007fe---56937636000.pdfIn PDF document text
    • https://successalpha.team/upload/files/makek.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/32468274731.pdfIn PDF document text
    • http://synowka.pl/galeria/file/xizosimebetarapuladilupuk.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/9756679867.pdfIn PDF document text
    • https://energooptima.hu/upload/File/vokufixomilise.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/pewipolawoju.pdfIn PDF document text
    • http://viorina-deko.com/images/file/nujide.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/gozumujetusudov.pdfIn PDF document text
    • http://kleiberit.ru/files/file/16836078531.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/25500859727.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/48747786413.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/6307083811.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161340a47428b3---79818700523.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/furatorofopogunekedivarox.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/bafifubiromimuporirotoga.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_off0000d98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 17144 bytes
SHA-256: bba9b16ffb177ecb6740081f1236dc9cf5c2f960cd8e45872c9b47c2f703ee9e
font_01_sfnt_off000105f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F6 10380 bytes
SHA-256: e31b3b579a92282d7741da6d420e9425df7c3d667a40e80e532a1f655e25ca25
font_02_sfnt_off00011d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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