Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f44154b659240f…

MALICIOUS

PDF

99.9 KB Created: 2021-06-11 13:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ee27ee3a1ee6b32cc7275bdd9ae8427b SHA-1: 0344102a3bc9fb940fc5acc66b84f955afe78a94 SHA-256: 64f44154b659240f75d3352f10198600d3bd31e4cc56fed1624b9e95c25334e7
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'jre windows 7 32 bit' in the document body and a related URL indicates a lure for potentially unwanted or malicious software. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://pixomot.ru/uplcv?utm_term=jre+windows+7+32+bit PDF link annotation
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef3be376d8---goramo.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/lageziz.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/bunuzabafirod.pdfIn PDF document text
    • https://actorconseil.com/files/file/tefepigex.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ov5c8sj8kc9no0rb4dsr3h1ar4/dokiluzoxiwivepuwot.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a794315ee32---paxufaneniwurububalalujo.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/71818378229.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/d8aa601ce683714360f76acfba25f6f7/66429534085.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5f9d8a599---33742363872.pdfIn PDF document text
    • https://lordpin.com/calisma2/files/uploads/meriwutoxilunawezela.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083ad2083625---88898873922.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a63b1cb6a---kafifagifexunibesakaz.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16078d719076b6---66549593538.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb88ad152c---mutonun.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/748595bf8594db10fa9532ecdba3a74a/28226463124.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9485c4941---83337568519.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a91aa601---36040204164.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/29840129523.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7F 5100 bytes
SHA-256: 65a7fd8d839ce976d5e00f4888cb6e333edaf50929cc1c1a5094ed2e72eb7f57
font_01_sfnt_off0000f16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 5176 bytes
SHA-256: 9ce7efcf4e7849030c2cdd6b2a06aaee6ead2103764d96c514e8edd0f8604ac1
font_02_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 2656 bytes
SHA-256: ff8289fcab20b7b81f5dc7c47458689637225d7099c48932a46d6898d6123f6c
font_03_sfnt_off00010e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2D 5032 bytes
SHA-256: bd2edf0acc87915201b8d7499338619d2ffb91b4953d7de679a5afaf5b335d6f
font_04_sfnt_off00011d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D97 6640 bytes
SHA-256: 593a452f0795506ac97007ad32b21767cc543cb1bc716fd74108abb5279d52e6
font_05_sfnt_off00012f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F35 16572 bytes
SHA-256: 9e8149503abfadea2d22882729709de2ee8eded8469f55f966cb4caa6697db32
font_06_sfnt_off00015f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F8B 16700 bytes
SHA-256: 9e4956692d4d5a7e464d139d8d5ff8f661b0cefba01125d678584dace36f98b3
font_07_sfnt_off000176ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176EA 2832 bytes
SHA-256: d7a1248cabf161ff78a072bd924b98f1b4e551660f4e151c9433689786990c0c

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