Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ea27046be53c94…

MALICIOUS

PDF

86.8 KB Created: 2021-09-13 01:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6c4af5692f665a7edd55eebdd0e8ff70 SHA-1: fa07a24cb27365f6eaebfd87114b1faf40f6f0ae SHA-256: f3ea27046be53c94bc4a27bf591dfc7fa378e2c4b990c4184903c9c3d279c17b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to redirect users to malicious content. The presence of external URIs and a link farm indicates a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fibaquitaine.fr/cebatrama/userfiles/files/dimilinuwa.pdf In PDF document text
    • https://micsys.in/userfiles/file/vilipexur.pdfIn PDF document text
    • http://maksimetall.ru/files/60610894762.pdfIn PDF document text
    • http://hzqzg.com/d/files/60939074648.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/56182689550.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/5197352286.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e10eb1a541---farowam.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/kuxosopuligawarel.pdfIn PDF document text
    • http://stagticket.com/fck_upload/file/sipenazuvisedepasizogo.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/9de815e5cc5aa94e209cc723f4ee4134/gixilojadatizaxivezude.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303d43a2757---xuxixarufolu.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/c1ffef378469b3152aaed73f7141fe04/33406730175.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/loramizibarunavovipas.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/28762261708.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/84593807773.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/14651270761.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/vawuwudusoneroworoxarol.pdfIn PDF document text
    • https://ijp2.com/contents/files/25557305174.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/lawotegoxizotoxiredi.pdfIn PDF document text
    • http://mywayrtk.org/userfiles/file/70759369021.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/refaw.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161354dc5c7672---vilatumolokajiwexirapuger.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/sesajozes.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/95717520434.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/70207587547.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=pubg+mobile+lite+new+apkPDF 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_off0000e29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 10744 bytes
SHA-256: 41be535a339c2e99c42afcbd639d0c946101f827127b93dffe9e60727f280e9e
font_02_sfnt_off00011333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11333 22164 bytes
SHA-256: 6590fd6d970aa03739103f7242901dbb6c9b5a72ef45472631def25468f5cf31