Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb1eddfcfca772a…

MALICIOUS

PDF

79.8 KB Created: 2021-08-30 07:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 574205a57f46598f9d2837de60e17334 SHA-1: 2eea06a0fce5d5edea132a55be4827675cc3dfaf SHA-256: 9eb1eddfcfca772a775c5e10f5a824abaf6fab1f674f1504832555bfcdeb5a6a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm containing numerous URLs pointing to various domains, some of which appear to be compromised CMS upload directories. The PDF structure and the nature of the URLs suggest it is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://digireg.org/upload/potuk.pdf In PDF document text
    • http://ototavandosemesi.com/resimler/file/69369189755.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/887074a3b17f2d6810d9ef696488490a/41885511462.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ac3607a079---fovuguj.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/25431028577.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6e923565---11270700472.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/14603333389.pdfIn PDF document text
    • http://weingut-suppan.at/files/midovamedivubixupiwido.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fda587554---63080743302.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae5f09b613---lovazovifawuduwediwono.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/75306872062.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/fatopadaba.pdfIn PDF document text
    • http://ahchala.com/img/file/naperetemenetidik.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/kgjkhevttsb833l1c5bjcjmd29/68012516841.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/tqbei4g22go187hhu06dn73ka6/17664909459.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/3102076135.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210829_f958d.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/70538565231.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/17274011358.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/7521744575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=the+dream+academy+life+in+a+northern+townPDF 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_off0000d127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD127 10736 bytes
SHA-256: 98baf1e7bd2e253f677862704cc8cdc6a6f0b2aab2ad4ace4ff6429b9252b7e2
font_01_sfnt_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 18300 bytes
SHA-256: 7ec11c8ff3e004808dfad5f154341471784a75343d51c34b434ab2cb03457f03
font_02_sfnt_off0001191d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1