Malicious PDF — malware analysis report

Static analysis result for SHA-256 184dbb47cccfe2e3…

MALICIOUS

PDF

86.3 KB Created: 2021-09-11 02:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13f4fb35bb47c8036e2b9917ec7ad518 SHA-1: 22c7e3ed644ba346c34889bc4714aa8165333435 SHA-256: 184dbb47cccfe2e3d37ac0ca5ba21663e9ceb6e34ac516f7f0f665c9a1fe4857
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://pistant.ru/uplcv?utm_term=desktop+mode+pixel+4
    • https://aakritidigitals.com/userfiles/files/loranidazovojelege.pdf
    • http://opuspointpartner.com/ckfinder/userfiles/files/67747865280.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc05c10e5d---32152528315.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130dfdd1551d---bokuruzanevumofa.pdf
    • http://ckm-machinery.com/userfiles/files/xoril.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd1b5c5b98---95057209651.pdf
    • https://motty-etai-sharon.com/files/files/beboti.pdf
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/wolotexewoleletiz.pdf
    • http://vekosgroup.ru/userfiles/file/17370944924.pdf
    • https://tainandentist.com/uploads/files/202109061448336889.pdf
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/panuw.pdf
    • http://veszpremlizards.hu/_user/file/4079993790.pdf
    • http://infunplastic.com/d/files/xopupopoxefotirirazorepa.pdf
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/divetepefajinamerudorugi.pdf
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/xokanovasigobixide.pdf
    • http://garage-fuji.jp/js/upload/files/musawojonipuwimif.pdf
    • http://regalmotors-jp.com/js/upload/files/64400094067.pdf
    • https://olgunbey.com/upload/ckfinder/files/65740157111.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c5b40a615---kanipunalutazol.pdf
    • http://phutungvespaco.com/luutru/files/tisameferi.pdf
    • http://bestbuyfromindia.com/userfiles/file/80654825487.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/95e0005fe07720feda13a1dc2333f779/vimokejegenosojafuwesi.pdf
    • http://kuresi-kaitori.com/upload/content_pic/files/tadijususizot.pdf
    • http://alacartedesign.de/userfiles/file/rinasumixatu.pdf
    • http://studiopedrazzini.eu/userfiles/files/faligenimoxuwesana.pdf
    • https://hamzsabegi60szallo.hu/UserFiles/File/57323372152.pdf
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/57657737083.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e751.bin
fe0b2436f54d57bd3a4f792b6c86bb9fd0f8fd55211b86270c21b703b39d55f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE751 10460 bytes
font_01_sfnt_off0000ff24.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 16792 bytes
font_02_sfnt_off00011736.bin
1d2f1902c7d660a5f867916a272eaf555b7ec92421284d1cb2a8dccb646b26a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11736 19888 bytes