Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea826141513793d…

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 02:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 743603324cc195a13e35765c8c6c9388 SHA-1: f0b107980deb706882ac4eb39b33a6418d137720 SHA-256: aea826141513793d7beaf7fb6f73afdce98fb86ce2872bdb530714e2ace1bf8f
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to potentially compromised websites, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript further supports malicious intent, likely for exploiting vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 7

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=farming+simulator+16+download PDF link annotation
    • https://keluargamimpi2.com/contents/files/48104967459.pdfIn PDF document text
    • https://hiroyoung.com/data/files/jopebagesivebufif.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396499e1b5a---satuwojufa.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/razewevaxagevujenidemowa.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/kanasalame.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/78171256968.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/zasunokujow.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/15917398315.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/58690549937.pdfIn PDF document text
    • http://masonhn.com/d/files/60008860808.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/44436385786.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/sogidolunezemi.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/legorifudokewegefal.pdfIn PDF document text
    • https://33mobility.net/uploads/files/vokekorototiwuf.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/70815487838.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/494c331296980f950aaa7787f2ce7610/wuwem.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/c7ee65d358f6fcab9be93b93bbd24ea3/wumixidojer.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/fodufinuponuwe.pdfIn PDF document text
    • http://harrodsrentacar.com/public_html/userfiles/file/zutufeke.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/nixeg.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ra7iv0grjjbcl3haq3dfhkbeoi/kixosoxidogebaxibew.pdfIn PDF document text
    • http://dentali.cz/files/files/ronaj.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/gabaroxelekutuda.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27D 10844 bytes
SHA-256: b0c76981a9ce20cf2da2920496148ea83ae3ec1fc33b3e061d133e3e329b122b
font_01_sfnt_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_02_sfnt_off0000e34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34C 21612 bytes
SHA-256: 7aed4152fdc8b390123e716ad9b543eb2c5ef3862f608959bb0b0d0ce996cc6d
font_03_sfnt_off00011b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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