Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a8b101a9eab2bc…

MALICIOUS

PDF

91.6 KB Created: 2021-07-10 04:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b87130969b1a48d474b9a0abac635651 SHA-1: 93fa326fe00c00768d69566d3899488ebde18a36 SHA-256: 69a8b101a9eab2bcef0810d37d8c74240facdf8431bfc82ec245ba01e70701cd
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. While no scripts were directly extracted, the nature of the link farm suggests an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://doganagolosa.it/file/22831763685.pdf In PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/temiluxojomadu.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2239f33ed---sujanamedoduniwa.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e03b3a46743---suregukupazigezepagu.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74b6c7442e---21630812198.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/avif7u5i71uf957s3ko3vcbntl/sakujaveb.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/lexidenetaladikifap.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210708_165118.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/8dd519acad790163eaa3301c327e7539/gisobosufaxumelob.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb910aa399d---38427224416.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/bewagekarov.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/5jnastgunvdpndv5q3ipvjt77c/vexajivoluvarumitevuxurer.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/81892404878.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ecd855286---65722534764.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2cef9d0b44654364263fa07df3b5229c/49752980004.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/25ca40c1ad038cba6d7d13320e4f2f25/bapopom.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/05f6ad5df089e63eaeb25f4c9f479a4a/67236885526.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/fevopidesorivedijisat.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/xididegamuxodixoburebobu.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/59558536861.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/cp5bqetakt5j8j4hmhk0n2e71f/pawono.pdfIn PDF document text
    • https://castel.ro/userfiles/file/90708875727.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2fc82fba1---23535309376.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/jckp3q5n2eel2ej3np540b935u/55971398763.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/at61qcqpg3p68ao1h1sskuu100/34950131964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=modified+uninstall+other+cracksPDF 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_off0000ffc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC7 10760 bytes
SHA-256: 6c4773d9ddd536ced8fa3aeed60c3ec7297918f854b7a8d3469e650cdf17fe71
font_01_sfnt_off0001187e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 18468 bytes
SHA-256: 0ca9c39c509d5c7745f072644e250a9336b665871fd99bf178b320a7dd92ed2f
font_02_sfnt_off0001475e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1475E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1