Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eced7dbf47ee54e…

MALICIOUS

PDF

86.3 KB Created: 2021-09-01 00:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7a031d9ef305eb84fc6d9024e9a10262 SHA-1: 070e4442a0dddf2bbb393149cf9f77a8909ad0c6 SHA-256: 4eced7dbf47ee54e97db276398a79821f4a365b559ddb7ee499ca1bdcf277659
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jaiminsales.com/ckfinder/userfiles/files/bemifivu.pdf In PDF document text
    • http://wecans.net/_UploadFile/Images/file/89326366357.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/41d5ea7229d40587a9ceb46dbaf8af19/gezagutodogolapubow.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/xawonawesikef.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021881817278402.pdfIn PDF document text
    • https://paperland.bg/uploads/file/nakirun.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1610b70aec7b44---24278859426.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a37691c5239---77442770530.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/71309ce2afaca07c56b60d334edb702d/83833617487.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/8ab8su9ulrbaq8239el2rc161c/94128657168.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c216e06d93b---40344800583.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/90555703178.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/nadurowokewiwezusigomerux.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/10381404059.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/23251786b346923bb54eba5a35a690e2/mokofele.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/502f2be14aa70cdd82cb241f02eb7a90/gugotijegiponavopo.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/duvifamozetiz.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/21675194967.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/rjfs54v31li1faud431so2aruf/5775501780.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/kurufe.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210615_1F115AA4B91C0483.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+find+apples+minecraftPDF 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_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 17624 bytes
SHA-256: 3d7dc01c77930d4e3de5f3e5322e82378ca831a6aa49894a514bdc94b1636d24
font_01_sfnt_off0001198c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A3 10860 bytes
SHA-256: f459c727dc0f4233d6dfb514396d597d2b40e8f6366e3991a6737e2ed611ceed

Open this report in the interactive analyzer, or submit your own file for analysis.