Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecdef6eeadca33c4…

MALICIOUS

PDF

90.5 KB Created: 2021-07-07 21:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4daf9d09413e81c84c47cf1f90168635 SHA-1: c0b72c0f5369ff930e38f3534e9dc1af71e9df3c SHA-256: ecdef6eeadca33c4735cb940b9256a5d521b44b7575cf4af6077338b7cd7f459
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites or disposable domains. The presence of multiple links to potentially malicious or compromised sites indicates an attempt to lure users into clicking on them, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://tasleemdubai.com/userfiles/files/gigurudibedowabugobozif.pdf In PDF document text
    • http://cbwmd.com/uploads/Files/jusigudikuvamuval.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/sulunarogosepeduwapexar.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/178c8202bf523b911a9341d8ab35c469/zadogakipu.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/molotinizagagenarenexuj.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a6209c99e---noxoramaz.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/rugef.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082780668a43---62943330278.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/74634133555.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/5f7cc482644e13e7162dc1e72bc2d56c/13984358635.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e22ebc601---namebatujad.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/e881f0f4881e8e7a52de766842d408c6/ribedivofavenetikeg.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdc84ce63c---bowelugobepusuzet.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/fikololazopoxagiwas.pdfIn PDF document text
    • https://t2sc.me/userfiles/xokewusol.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/p9e424qv7g65021ej83b8caipf/faxososawomaseguwi.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/nafibajatipamujaworab.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/bebovewep.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/fobesemog.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/dcc145b86b094e59f46d28237d49fd07/19817321133.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/54413610174.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/aa4c3f29dd927ace52a1537a0b9ff0f7/46652476568.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dab93d6cfc---parigojokuza.pdfIn PDF document text
    • https://exporoaster.com/app/webroot/files/images/pages/files/pibixekiliguxuxafijuwoges.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=solve+for+x+using+base+10+logarithms+calculatorPDF 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_off0000fd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 11440 bytes
SHA-256: 099b0e9d6c37193c3d370100796d795910573be2d903122f9cd998bf0d194fd1
font_01_sfnt_off00011817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11817 16828 bytes
SHA-256: a48510fdc74d1bbefad5f03cae42e4a97286575460bd458baf681996205cb01c
font_02_sfnt_off00014431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14431 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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