Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dabb49a15ee12f5…

MALICIOUS

PDF

90.0 KB Created: 2021-08-13 04:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 47effc40dfa6ed11482596c058aa8023 SHA-1: 4d5ce719f087ad4d788c92e5388bcfcb33df37b9 SHA-256: 3dabb49a15ee12f520a953d31fdc521419690efdcfcd2b41386e44ff93ecb0d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://irlanc.ru/uplcv?utm_term=marble+run+ideas PDF link annotation
    • http://lhsclassof77.com/clients/34792/File/73140400319.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/nokavatalesekof.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad9a0c6dde---32267488438.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/gigoniwawaju.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de1848cb839---tekadekun.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/sadeludaselujenurenonub.pdfIn PDF document text
    • http://meadclassof1991.com/clients/c/cc/cc689d7a74a098ef67b43942063c7ff9/File/zixisizan.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/soluwejunobat.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/sejis.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7fadbbedbf106d2b1548fbba5146e7a4/papefi.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071facf67652---9532450116.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c70edd331ff---xilisofoxogik.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/il0jpu11hng1ffsnomc40eh9ie/banusimigolokudoxu.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/kovunitagabezunet.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/dikek.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/17499360397.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/koximunadivufolamal.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/21856213707.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/51939105642.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/pizimexexutefezokazemej.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ebb987e24---69657374121.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdcca6ae40---51095981182.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/cef74fb9010c90a567209d1e2bf4b350/kaninorifawajujokewefuri.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/26923432034.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160750b349c346---xodupi.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_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 17544 bytes
SHA-256: 3644e8423182e88181d8b51464bf68f2ded16fc4430c805ec4a40bbdfd2da560
font_01_sfnt_off00012a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A00 10256 bytes
SHA-256: ebbd4e099a927d25eac0eaad780953e138df29c573fa6344302132bb89a41028
font_02_sfnt_off00014114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14114 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1