Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3330748ec463bde…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 07:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 471f322531ae31720f9d04716ed3a4a0 SHA-1: f3a4074523dd30e8fa0f7a7e6d090c63ea4b1ec5 SHA-256: d3330748ec463bde1004e588d2d84048b4e2cb3f4644a0f458a424a1f6c8cabb
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs further supports the malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/uplcv?utm_term=popcorn+time+apk+download+android PDF link annotation
    • http://ddservice-bmw.pl/userfiles/file/keramibe.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/gujokuvedumivokudomuz.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/44184574496.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/54667098250.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/desomebukitusotuwezorapav.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/gafejixos.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/xezerixew.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/77753054079.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2ff718c84---98229463838.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210902_BCD9ACACABB9469A.pdfIn PDF document text
    • https://soechi.id/userfiles/file/63935671621.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/88830558892.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/10336420500.pdfIn PDF document text
    • http://olympusflights.com/files/files/97366025424.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138f9a3e149e---87469735372.pdfIn PDF document text
    • http://preiss.at/upload_files/files/6942913445.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/gezadapoxodajibum.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/54909467821.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/pedilaboxamu.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/xijudirivamo.pdfIn PDF document text
    • https://beltamas.by/content/Files/52745256663.pdfIn PDF document text
    • https://fptica.ru/images/file/zenasoxerubukimop.pdfIn PDF document text
    • https://spitalmoldovanoua.ro/ckfinder/userfiles/files/10161725376.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_off0000d618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 17724 bytes
SHA-256: b6a15c18723e5701f7fa81e0e26e31808fe1dc9126794db482d0b6a1678490e2
font_02_sfnt_off00011c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C31 10684 bytes
SHA-256: 06c154e82780985b5501c4f9e3399b3aee4f3bda9fcfc313aa6dc01bf8cf9884

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