Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19200581021bda4…

MALICIOUS

PDF

66.2 KB Created: 2021-06-23 17:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 22b0fbd1a89d2d6a0914b3302ca90748 SHA-1: fccd6dd1ca0214e848c8b7f3e2a1241dd6bd4ce2 SHA-256: f19200581021bda4f689a280a6acafb4c4266bd7bac4cb8eaed06216575119bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous links to external sites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a high likelihood of malicious intent, possibly involving redirection to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://fatamorgana.fr/uploads/assets/file/23438377759.pdf In PDF document text
    • https://cortopolis.ar/userfiles/file/tojenazagorivebi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaec5e5bca---82646445203.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/dewenijokerojuzake.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b476d6af894975c45c668a280008ed67/7667415516.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ef61f053f---90939650806.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/36481210618.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088019f1be36---43701838784.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160702d4326fe6---tadimalipagibesife.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/fd8175d42634f735a66ae22c03970893/rifip.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/an8gsd5gldteetb0f1u158n84i/19540441609.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2dffbfd2ea188f30dec6eb90a05fde56/muzes.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/506b84247ace258a9db69344b4bbeebb/74701961089.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/01qnjgumljpbdhadbmkd1ll1l6/59518879426.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/pudogimikuvup.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/18340951779.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6a6902d0eb828b19518334e43c5a5ed1/ripogewunawit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=lycoming+o+235+manualPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E2 5308 bytes
SHA-256: 57e42dcf0d483e046de6dac33797f6de112c94d16553cc9f3c95d5242e0e005a
font_01_sfnt_off0000d4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F8 10880 bytes
SHA-256: 374429f52117739846154ee40f3fbf67c7245e3c01c2f1d0dc54cc6667b8f4a9