Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bad2fa314c734c7…

MALICIOUS

PDF

82.8 KB Created: 2021-09-05 05:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d19c10777e8fcad50069bc131c139355 SHA-1: 377736ad6316863ae7b6c79849d901b2bb23d85b SHA-256: 6bad2fa314c734c73d4b4c2c883b005efbd6bef109fdf5997c07534494919f5c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, which flagged it as a phishing trojan. The file contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users into clicking through to malicious content. The presence of multiple links on potentially compromised infrastructure suggests an attempt to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/61c96f277053130f6297cf05c3f167f8/52294895392.pdf In PDF document text
    • http://thevelascofamily.com/clients/11614/File/43119223662.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6b82c95f7---vineloxuf.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/mjane36cmehik16roof3k49mje/sulenukibab.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/43408584775.pdfIn PDF document text
    • http://metall-press.ru/files/kitugazasutipijet.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/vunetexedomonezajajulu.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-14/20210514071127933686.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/webefokakalaseni.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/75436833537.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d0705cfcf---33830482851.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/33274016536.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/puparesux.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///98202679523.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/34162476520.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/dezanevefisibif.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/xepatum.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/refovivavikonudiwu.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a82a3865ad3---beguvotorinerosoxafuwol.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/78055105389.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/togulosokanotupoj.pdfIn PDF document text
    • http://tipiland.net/upload/file/16118056666.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/72024824873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=tabel+trigonometri+lengkap+sampai+360+pdfPDF 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_off0000e00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00A 11500 bytes
SHA-256: d5fb75e2b4d9a00d06fce630e95ba8c0c059001dc769ac9687bbf862f42fa277
font_01_sfnt_off0000fada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EC 16368 bytes
SHA-256: e8dd446bf38b461a159201ee926547e86c17161e9083ab9ba3f2a3d1d0f7e1e9

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