Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae7119aab66c948…

MALICIOUS

PDF

83.7 KB Created: 2021-09-07 04:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9475f84fb531b6ce78afdf98fe20d53c SHA-1: 10274ff8f3f35c2c7214e5b95fdf4c1b4451eb2e SHA-256: 3ae7119aab66c9485058c66c287b42dc11a749e927d29cc565b5b50880c68186
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM suggests an attempt to obscure the true destination or leverage SEO tactics for distribution. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=john+deere+gator+4x2+owners+manual PDF link annotation
    • https://vidaleve.net/ckfinder/userfiles/files/40151663042.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b7c82616091.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xidijax.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/nejefosiwi.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/63952a8f7f5c5b94887d3c049c20a60a/43745792038.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/24061151921.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/xoxomuxofexof.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/xejufegopazofigup.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/78781302010.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/59718486387.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/qsbqkkig4d617122b7iuru4cfd/fomazigimukerumewufutefu.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360e4f92a4e---zazutabavusobat.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/472b833242f159670d2c571c2651a825/nasegupuxipu.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14840098815.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cae9d086cc---xekibexexoto.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/mukemufejobilokuri.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/77008382875.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/18b905926be724c8f465ba8c5ef85a0f/domawabenewugakom.pdfIn PDF document text
    • https://aokman-drive.com/d/files/zedawepu.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/87966235631.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/fm77vvnhv7037o1h0lt4sc6rk5/kumowekiletu.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/cc43cda9bcb02bc41fc98299045b7e03/fulexubobamona.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/fukulususi.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160820782d371e---64000630533.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612584f37f257---siroxitirabozageka.pdfIn PDF document text
    • 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_off0000e27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 17160 bytes
SHA-256: 77ada63f2ae4b61784f33ba94a2d8909f2c819343b7e18c39d22f7f891e07226
font_01_sfnt_off00010ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED3 11080 bytes
SHA-256: 45b2ae68f4a7f211d39690c1136b16ced1a0b04bd516bb67eb5b214c930ee4ae
font_02_sfnt_off0001287c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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