Malicious PDF — malware analysis report

Static analysis result for SHA-256 185ad6887c2ce782…

MALICIOUS

PDF

80.7 KB Created: 2021-06-27 22:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ce4c66f7d3b2ff8d24b311aac429fe62 SHA-1: 223ab2e26d78f46c1ed887e067221ed676821edd SHA-256: 185ad6887c2ce7828dbac95048271b997e2ff186281c684a7ff6ee0cef5e32df
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload storage, suggesting a link farm designed to host malicious files. The presence of URLs with 'powerpoint+2007+download+for+pc' in the query parameters indicates a lure for users seeking software. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • 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://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160abcf994c4ce---48022608521.pdf In PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/cd02d833b1415b5a4fd47d23f66f6590/pipimetuzusidelogij.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/sudifaf.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/xaginigiravupeboxo.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160780c1aecdf6---65943091207.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/41832771521.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/nu594fb921rk4i8ni2kbgn3otq/76650625732.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ebffc3b1e---zizidarejozujose.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b2fc99cb---xejapexuwazibivi.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c34aa51be---16516502138.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/b033c47432d07df23ab636ad47bbc526/70707930478.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd33040a49---tufabojofokemawe.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/44971977419.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/118cd777b695300343ffbf1458862533/wixonuzulunarokuwigado.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f10ed9e3ed---75620842191.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///fagoxa.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/ditoroz.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/3320605e148d734bdc674bd5919d3098/29415791513.pdfIn PDF document text
    • http://novichiha.ru/pic/file/16899192379.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/nugovoregirokuxuse.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/69667511043.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/18b40e21cb879355329a34ca46a7a6b5/85695883855.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/sosekilovawativotavali.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608167deb03d6---lotivogufapoleso.pdfIn PDF document text
    • http://rsst77.ru/upload/files/vusubeselijexigovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=powerpoint+2007+download+for+pcPDF 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_off0000d7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DC 17040 bytes
SHA-256: 79548248e450a91167482edfadbed95cd4b881a2743ab63a0f3b7307c183f3e7
font_01_sfnt_off000103dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF4 10824 bytes
SHA-256: 69d645fcfe48060447dc2a365e8272bc9af849b89ba09f985a237414b248ce9b

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