Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead0e9ffdac9ab0f…

MALICIOUS

PDF

84.6 KB Created: 2021-09-01 05:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3fa678a55be8f7f285836eff2857d721 SHA-1: 95ad10e015662961842a8a33aa9e8793c1865294 SHA-256: ead0e9ffdac9ab0ff78b8fdefd7f533653b140839f7d478f625e47cb4e2585de
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://akcjonariusz.com/UserFiles/file/mimeraniwuzami.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/db5330bfdb2890b2e2182a66f1a0e628/patizoluxatewij.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/72560970061048a3b9678d.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7279a2a09---namibeguwexaboviveviz.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b59268362---20206550307.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/61400277816.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/tameg.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609bef83037ab---92841854316.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210831174645.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/d5796fb7bf01992bc0b06dc7656eb057/66023355885.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/98032125888.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/cd4thk7kqp2p0ri1lnjt073upv/zagugedusibekomubivip.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60c442a2e92cd.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/6043a183ef41bb8f6d14ff95dad3dc9b/39825311527.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e2d7b393ee0---supunokase.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f45ed22a895---79622503476.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075189b4132e---33921627373.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a0fbbade7---susure.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/16557055082.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/5288819e2d43c0a78c361cb9c5e31f51/mokowuketatutareted.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/1691128303316ddf04a4681c98fbb244/vonipawave.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b1036e661---rikisukuzonesad.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/pagisifabuwagapuluz.pdfIn PDF document text
    • https://mavibusiness.it/file/57833998674.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/ef5182bc30c2657d099e35ba61847e46/popubilafugudebepaj.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/0a56fb471eccaa688018890f83e65c92/81986898653.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ff+crystal+chronicles+pcPDF 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_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 10668 bytes
SHA-256: dd0e1f0ecf956da2d4cd0e03e08be33d132b8087e2989065bc1cff2ff4025d8e
font_01_sfnt_off0000fed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED6 17940 bytes
SHA-256: c4354ee86c79316bd0687eaf0bbfa8d3e4431fa29555b62ee84e8137b364d354
font_02_sfnt_off00012c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1