Malicious PDF — malware analysis report

Static analysis result for SHA-256 206e026a8f93878c…

MALICIOUS

PDF

81.3 KB Created: 2021-09-12 23:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 05e57f9e72005bafa3878c92ef0e1d57 SHA-1: 9532700726a10a783c69148530e949d474ceb0ac SHA-256: 206e026a8f93878c6c36b0a529aa2e35cea0d9a1d25e6805d0e940c040396c28
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 to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7d95bfa40---fitawuwozafawobomag.pdf In PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a933c76d5d---vesarigemalofape.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/nexikijiledaditejadavotiz.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/38385097958.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/1446540245.pdfIn PDF document text
    • https://qnzar.com/files/janiwawesozuwuguk.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/xarotabimomimupajexafu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/ee57bdf27f66ab7e498c996f7885230d/62653839168.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/xipagej.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/tubuvoxubenobufun.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/71665086803.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/mimozo.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/zokere.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/doxuvipifugudapetuk.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/34421415399.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/45045143993.pdfIn PDF document text
    • http://rivucota.com/upload/files/nowamerekesamowifekafise.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/kipamelukuzowagukapi.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/74157504249.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c119e26eb5461d092c3729cf76cd6d9c/pigagejovux.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/91062753955.pdfIn PDF document text
    • http://rentaruedas.com/files/others/xetaguwapepega.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/6773456767.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/bolaja.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b48a0f6e3---zotujag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=forza+horizon+4+apk+free+download+for+androidPDF link annotation
    • 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_off0000d95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 10624 bytes
SHA-256: b8654831c93ddbe36e6f31dd68ff30894cd1ecc80818e2ae2399dd8c1811fc6c
font_02_sfnt_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 17400 bytes
SHA-256: 49a2c4eeaedf610460dff7df44691df760be276b114ef15ef5f1edf831f30a64

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