Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e17cd33042e6ec4…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 05:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b1490661c24b1ffc4c27cc328ce8c996 SHA-1: 6470a82be6b2b86192cae5f79b6cdc01ea9dfa96 SHA-256: 2e17cd33042e6ec40ec5029ff5ec2742d144fb4aab9d3f52a089f5cc07f18454
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites and disposable hosting. These links likely serve to redirect users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://nomylo.ru/uplcv?utm_term=dmso+solvent+boiling+point PDF link annotation
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5590682f3---25162388823.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/zimexateranibo.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a442bd7ab5d---27937252546.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/fulopuwune.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/12916104355.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f36bcf6f840---jodoletemulojese.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c325af1a55b---zasepuwidizukowazedir.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/3625904356.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/jejakafasi.pdfIn PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/posakov.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/25272936491.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3fb97510af---desopimoxo.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0d981462---38248329117.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1da7218511---47702640042.pdfIn PDF document text
    • http://elai.kz/upload/2021/08files/2108220823040446587gu6t.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca705d7ed6---77395443987.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bae58e8952a---53258895504.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/cb24e620c5a0b2dcb615c8f9f15880ca/kiwowipapaz.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/71934039983.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d4dc907df1a930bc020d64c998435a20/49745830241.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/56249421714.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210708154620_1742619324.pdfIn PDF document text
    • http://belloverde.net/emailer/file/85458033137.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/dojix.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/zepajureja.pdfIn PDF document text
    • http://altus.pl/userfiles/file/lalitidumijalezi.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_off0000e046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE046 10540 bytes
SHA-256: 4b3230617cd60c9dac71a033d434019e6091fe391e7678653bffc53faec1bf90
font_01_sfnt_off0000f80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80D 17556 bytes
SHA-256: 7a00a955b7079da3154a8ae248278d543b628a07989b6c88bb6859a75ac115b2
font_02_sfnt_off0001259f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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