Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2eaa96999d19421…

MALICIOUS

PDF

90.9 KB Created: 2021-09-05 02:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e0d3dbfe90caa710223ca427920cb73f SHA-1: ec98e47bfd993cf22556890ab0802a668ddc6bb6 SHA-256: a2eaa96999d19421624b77e8a1b646729c1b10709375519559ce67a788f2268c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload directories, a common technique for hosting malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610096f1069e2---68181626346.pdf In PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c906cb387c1---74302041251.pdfIn PDF document text
    • https://eniedu.com/data/file/20210820102654.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/mowojegakuserekekebat.pdfIn PDF document text
    • https://go2germany.ru/files/file/9456014631.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/41364000021.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/10a01e14809494af2ecbe96206da8997/rebefezagixafovesotejili.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceccda6d68---32422763122.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/vezasaw.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/beziwawutozeboxeguv.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/92591494913.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/xujaz.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0266a7ec4---buwunipejiwif.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b80be292e31---31182258115.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/87107978708.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/fipimofazumifibonoloxi.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b16967c35---wetutosaduxi.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/31025428c33cf2c5e578d889f5332f6d/wugatutolalezavoderope.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/67430242385.pdfIn PDF document text
    • http://novichiha.ru/pic/file/naraxerob.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/25567856891.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/27677239503.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/65004177074.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=xenium+modchip+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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 18540 bytes
SHA-256: bba70a9a4d6d62c056abe11b81b6c9af765f9118958b7818f7be61edf39058e1
font_01_sfnt_off00012d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D58 10520 bytes
SHA-256: f39b2a2963cec91a059d2f4e7aac81b3da43e284389a7453a36a450134db2fe7
font_02_sfnt_off000144ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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