Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1e246290b9d539…

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 20:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c741d904e0ad33af3c230e6b46f54bd8 SHA-1: 3915ca9a5fa77404768c345327c419710387f474 SHA-256: 0d1e246290b9d5391d2e2fc5b903c27a3da48a8771d34106f7bed2c284f86c43
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and contains no readable content, but the heuristics and URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://anhbanglaw.com/userfiles/file/22727552015.pdf In PDF document text
    • http://nordicaluminium.ru/userfiles/file/gunavomagupotuzez.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/molasajijole.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/g6jr7fd1ngcp569h7shdha3eoo/42169095824.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/2sem8gv41rgiampn2u9ad02rs2/bifuzuririzomavikogem.pdfIn PDF document text
    • https://ka-base.no/images_content/file/76693091498.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a034a1c420---1479656569.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/o9bb8eg9m2fcmi0c7irpnv3mk0/nadizevefikosenemagevumax.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/f4251f6e434eb87135fb1dad4ac0f11e/78875152509.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/56b6915d89b4ac85c6984705f5de202c/takinosawawanepejawa.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/sexaxusus.pdfIn PDF document text
    • https://wipaphun.com/UserFiles/File/78785109447.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/toloro.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/divijen.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/jebigusibawokemelun.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/713f7eb358d14e37d399df5d422af4a1/7598055585.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/xidabapinoralagikiduve.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/28413750470.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd3488e676---pemur.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/vp4oi8rdi4gnctvunvatpprj5l/17562037930.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160943700eb21a---bevowobejizabudovo.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd681a35b4---74080667778.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c82bedd01---rirugufilepizinug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=herman+melville+typee+pdfPDF link annotation
    • https://mediaget.com/userfiles/files/57957557891.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_off0000e04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF861 10544 bytes
SHA-256: ae6fe46adc71a2e58557dd6434c6c04b38f6aa6c371552238e7038263212efc8
font_02_sfnt_off00011050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11050 17932 bytes
SHA-256: f534819508f99cb986e570b72d2da123aa315906f331a718929e6a39040bc2cc

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