Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa045f5c8614ec8b…

MALICIOUS

PDF

88.8 KB Created: 2021-10-08 06:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 77b09a81c9068536f3c4e007e2d98cf6 SHA-1: 1463f3c60465e9e9679e2fa62919d642f5ad97e6 SHA-256: fa045f5c8614ec8b67378e93a23217fbf000340b091de14c4eb1f85c97d6bf96
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload directories, suggesting it is designed to host or redirect to malicious content. The presence of JavaScript indicates potential for client-side exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ldoris.com/upfile/files/20210929105422.pdf In PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/5617a6701cd4d48d95a62d6a898fb613/xakisamiroxefobesejasimav.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/dbadcab327a3eca3f64ef3849cbfbdc3/luxofafimepuboruvedap.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/14417652415.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/85195299578.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/zajur.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/kabisek.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/zepipuk.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/8136294674.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/46583793988.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/kivabuzixak.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/82469990606.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/pijivifomufagepi.pdfIn PDF document text
    • http://ariege.proximeo.com/ckfinder/userfiles/files/xalapuvil.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16159d8d3b44f4---49421554385.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/38214421571.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/rodujuzi.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/80579621476.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/toxidawalofu.pdfIn PDF document text
    • http://sun-tes.ru/files/file/75097456396.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/nogajutewigedamolilikew.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/1ebf30863cdd4ee7f3a8b2fc5f5239db/31792870312.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/xafejowekobirovix.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/fubabi.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/vonofajisezalopulozu.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/86508645135.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/totoxew.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/65508906540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=mere+christianity+study+guide+answersPDF 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_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 10776 bytes
SHA-256: 001fa8d8b2cd27250124050fa7f478ca66aad595f26bb0c7c9b6704da69ffc86
font_01_sfnt_off0001094b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094B 19948 bytes
SHA-256: 321f52c15b749aab0e2b33201a695cebd246e25e9aeccbba88585918b85b888e
font_02_sfnt_off00013d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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