Malicious PDF — malware analysis report

Static analysis result for SHA-256 096ab272129446f5…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 04:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 69dc47ece9ceb4fff58eea22f04b3f4e SHA-1: 743e09ecd7bd95f597574350194bdb2041ef180b SHA-256: 096ab272129446f51b3677bb11293b107d22e49e68988ab8a062b2ee48d5d5b8
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure and embedded links are consistent with a tactic to lure users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ourcampuswindow.com/ckfinder/userfiles/files/roronijiposoma.pdf In PDF document text
    • http://liqaa-lb.com/files/userfiles/files/29227959198.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/5f7a9b1d8efa729034da677089df5b84/wabozerujodokefe.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/84916128953.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/bff68717a7c79859d0f1688258cd7b25/kakisazalipisimirevu.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/robufedutanezoxuzaka.pdfIn PDF document text
    • https://sapthagireesyathra.com/userfiles/file/83443965144.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/tefizojojegebot.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/66112962997.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/21507643270.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/84945874275.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/xobuvewamajazawi.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/gunilifipuzorebupumo.pdfIn PDF document text
    • http://billsky.ee/files/file/suzakagerokefomuneviziba.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/25758863992.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/dadilusinolu.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/ladamaluxiwarufuvisit.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/pogotukebivi.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/36027129920.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/64809363391.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/lotozujokipufifo.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/69774584035.pdfIn PDF document text
    • https://combrooncom.com/contents/files/vozunuzubixulil.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/6d177d47cf9bb936807c41a51a001939/suturaxugukovaxifitaje.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/207d17a9435fe48613623a0955c4e418/soluxipa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=gta+3+mod+gta+4+androidPDF 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_off0000d9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 17456 bytes
SHA-256: d1d089b7eaff8d2bb3080909a5fdafac45fc8df5c3a3fe59dddc157c81e04c01
font_02_sfnt_off00011eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB0 10536 bytes
SHA-256: f925cb6cc0cc9df3e8f546ea060a7aa7849120aa26add1da90d1d6003932e25f

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