Malicious PDF — malware analysis report

Static analysis result for SHA-256 d458befe252d7a4e…

MALICIOUS

PDF

83.6 KB Created: 2021-09-21 07:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 327008199fc62f446c57715adf17c2e1 SHA-1: 51be56c697537ab4f31c00eba85a794a29a76760 SHA-256: d458befe252d7a4e65791461a1b5538510b0a33eace1c66a2c2b402e31ebcb5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is used to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://smidgel.ru/uplcv?utm_term=why+is+my+phone+calendar+not+syncing+with+my+computer PDF link annotation
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161494d186960f---rexajuwiditujo.pdfIn PDF document text
    • http://mijn-nederland.nl/userfiles/file/76520241615.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a78286a50---lujasagijoga.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/28821599571.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/pofuwokixevi.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/lexixibitavisikipigozak.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e38e9fc3c---45116520035.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a885b77f58---xexofugomuzoderiveno.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/kilikoxadoxewajugifesup.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/samonutumitetugogofovasej.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/zigazizopaposama.pdfIn PDF document text
    • https://trystsalonri.com/images/file/37771651616.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/dexiwiji.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/9283030295.pdfIn PDF document text
    • http://strandedtattoo.com/file/ritexuboje.pdfIn PDF document text
    • http://askort.pl/Upload/file/wusufutugopa.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/91593508948.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/wusevoninetijisanu.pdfIn PDF document text
    • http://gekon.net/userfiles/file/98686990717.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/xaresolotukupuborov.pdfIn PDF document text
    • https://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/vepuxekapowifutu.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/70179347898.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/jedifeboforazoleki.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/76407848242.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_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 17424 bytes
SHA-256: 2cb8a95f8c1a00b8b47f97a6a900ab4581d906551ded0ff5c850c475abda2bfe
font_02_sfnt_off0001260d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260D 11252 bytes
SHA-256: db2ee8fa494a260173433ea41d56cbfc6483a67ebe3ca11c0fb2d607c828825e

Open this report in the interactive analyzer, or submit your own file for analysis.