Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad0673fac1cdf50…

MALICIOUS

PDF

72.3 KB Created: 2021-09-04 11:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0c2c40fe0e8080a217cab1a9845c1289 SHA-1: efe225350b5c6a41be7702ba650f3ddc13b54e7f SHA-256: 0ad0673fac1cdf50d6aea071dbdae1507b9f2ea0d437f2588dd95c87f04ea707
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning model and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, hosting numerous links on potentially compromised or disposable domains. These links likely lead to further malicious content or phishing pages, aiming to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077354f3af92---93366128503.pdf In PDF document text
    • http://bjallstar.com/upload/file/84164338048.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/vanobowizezedidapetuxu.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/53867710410.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/bikesafinovisonivele.pdfIn PDF document text
    • https://cartolmania.it/file/mefapuvegutobojawefi.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/38413493711.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072c701de356---38728359166.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210722_141652.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/i85j35tlh4vl6iibf1bfl2m506/mazolugujozizifivudaza.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/lixumug.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3305edbc0---93149321098.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210612_174301.pdfIn PDF document text
    • http://fruitofthespiritcatering.com/clients/9/9e/9e5e3efd27976f294ade36eaf76108d7/File/purafaxosa.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c862abecab9---85460082311.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/lukilotumilab.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/putekuxila.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/qd84kk195ac9rtb0rndv9j2ba1/vagubokabigopavegagerizab.pdfIn PDF document text
    • https://lukili.ch/UserFiles/files/guxamizununawiv.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/junamutezekokutinumijamuk.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/fivedawemudefov.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/zoribupuxuruso.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/29864482667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=business+management+course+book+pdfPDF 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_off0000bb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB05 11304 bytes
SHA-256: b13ee8bce1fd81661dd52869910a9feec8fe368fbba5581c1b5a80445b93d930
font_01_sfnt_off0000d52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52F 15160 bytes
SHA-256: b7fb161ced54af565d89f41f7dea874d60932ebe252e0e3d318a974c48e7924f
font_02_sfnt_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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