Malicious PDF — malware analysis report

Static analysis result for SHA-256 014cd0459e542e33…

MALICIOUS

PDF

78.3 KB Created: 2021-09-20 06:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b7246b6717b078d105c0366220eeaf53 SHA-1: 71255ea41fbc193249dfadd4b4183e6c8e7f6782 SHA-256: 014cd0459e542e333913a4b5fbfa098c90827723ecccbc0be71e0aca0eb0e33a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that function as a link farm, directing users to various external websites. Several of these URLs point to compromised CMS upload directories, indicating a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://philabc.ru/uplcv?utm_term=google+mainokset+pois+android PDF link annotation
    • https://marlin-shop.ru/ckfinder/userfiles/files/3931915285.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/96265588565.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/tasafojekojewesuli.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/30133100808.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/41723030777.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/zexawoxise.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/91299968303.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/luvexikobizejapezabun.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613115062add2---kosavimubufidisi.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351657dfc73---zezeminofolisibi.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/37445566871.pdfIn PDF document text
    • http://axwelindia.com/uploads/voboxutarinopalimufuxi.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/35733870961.pdfIn PDF document text
    • http://julianina.dk/upload/file/pulikunesivo.pdfIn PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/86042617702.pdfIn PDF document text
    • http://esistore.de/userfiles/file/kuveji.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/d05d7f9273bc22a24d335e3ad40026e6/24809050184.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/kemafiwogupadazirebosewef.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/sexategu.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/suravita.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/xisud.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/11042585588.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_off0000ccd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD2 10864 bytes
SHA-256: 0ee46acfc35529dbac7f5956e8b7b5e04f2da307f401e201a6948154b57187c9
font_01_sfnt_off0000e5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 17680 bytes
SHA-256: 2885d1fb68aa4682e05d1ccf5cef0bfed6a77cbd46b6929dd20d255b6d24aa20
font_02_sfnt_off00011379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11379 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1