Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd7dc69b6710519…

MALICIOUS

PDF

79.3 KB Created: 2021-09-10 15:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 79f014aaa1c7516a36da76ebd42ffa8d SHA-1: 1d39d657a2076a43548c410dd7fad9cf98760342 SHA-256: ebd7dc69b67105197c027abad66f8ff7400ffa30a13ca62eae3ad8350a6e1bb4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on potentially disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://dorfadvertising.com/ckfinder/userfiles/files/54491783686.pdf In PDF document text
    • http://esistore.de/userfiles/file/xesepaboraxo.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/duzunomofu.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/60264526377.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/57084731720.pdfIn PDF document text
    • http://thongthien.vn/upload/files/18326568368.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021090704562273499.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/20699667806.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613007d4c0284---pojegewanirufe.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/95298011894.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/40098168773.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/fugumolimigajofe.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16132ee9b91390---xawozurokowubomagedaf.pdfIn PDF document text
    • http://willajarmar.pl/userfiles/file/tapigivonuvewudugali.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/torobevagepigawezapud.pdfIn PDF document text
    • https://pratham.one/file/59321484601.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/vofebevafepevum.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/o8umb571q1k08dq2jc4284auoj/31947741297.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/punebugemagu.pdfIn PDF document text
    • https://ewt.cz/res/file/37159270912.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/68463519061.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/lakitevilafex.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/ef560c052bb8a843e9025ad3d77ab6cc/27094468750.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/nilusokuxufo.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/59659681671.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=curriculum+meaning+pptPDF 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_off0000d114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD114 18084 bytes
SHA-256: 12fc814cfdb9868375b8b139e2a52a1034e7990c0b7087671d34665c43f47052
font_01_sfnt_off0000ff90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF90 10560 bytes
SHA-256: 7cf894f5739b2ad599bff5ed902af1897b050896e83834980188f68c1a932ef6
font_02_sfnt_off0001179f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1