Malicious PDF — malware analysis report

Static analysis result for SHA-256 f081daa0d7de14bf…

MALICIOUS

PDF

92.7 KB Created: 2021-08-14 20:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9fb2376fb79e1f2851e7a05d5119bf29 SHA-1: 9fb62d78779999aecd67fcccec897de7309c4e2c SHA-256: f081daa0d7de14bf29701abd9109a4d0b722edabb63667b68d704cadaf75d379
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and embedded URLs indicate it's likely part of a phishing campaign or a distribution mechanism for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://crysiq.ru/uplcv?utm_term=alight+motion+pro+apk+3.2+0+indir+pc PDF link annotation
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/b24cd60e9bdf0c1736967406dd3f536b/zozetafe.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/zotune.pdfIn PDF document text
    • https://bselink.com/userfiles/file/50217482212.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/pupitob.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/93385764895.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/00bd607aa735f1dca35770f2310a7520/bumuzezulowev.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c2657df8e---92063814676.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0dbe41cce2---livimigagusidexikezokedu.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210719123342_mp8z4w.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/wusafadu.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e96ad9699---59958498374.pdfIn PDF document text
    • http://cochu.net/resimler/files/dikamefezomoxebunite.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/luvirajusopeditalejo.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff75706865---14191650647.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/samibekosuromefezofokam.pdfIn PDF document text
    • http://snsi.jp/image/news_file/jovopep.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/sesugituloxifakubamu.pdfIn PDF document text
    • https://eslms.com/userfiles/file/suwexarevekafijoreri.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/bc8c91c7972a44b806ef1214cff0f835/nesaz.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/wufosegumu.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7522074fea---gavimosemima.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/fca0253c4b11369b52efa690a8a53e43/47002211163.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_off000103bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BB 11212 bytes
SHA-256: c3ee5a94197f389d4488f1bd07ecdf7d311bc10da2b5e3d2dbf74813de9bd707
font_01_sfnt_off00011d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D98 17732 bytes
SHA-256: 505f0c82d8b72a674c15a3755e28f208805cb7285330b55f3940d05a4bad14d7
font_02_sfnt_off00014c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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