Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3600cd19e522b3c…

MALICIOUS

PDF

77.4 KB Created: 2021-09-11 03:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 0816d403e33470ca090f11b27e7d10bd SHA-1: 8f99d2106b34c0e626f5592f1f60a4dbfcfd3767 SHA-256: b3600cd19e522b3c72d9d19267b594ba505516f764ebe9f0a814497b83ac2017
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 http://faurau.com/luodan/images/userfiles/file/64843469844.pdf In PDF document text
    • http://savages.lu/imagesRTE/files/zanikel.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/92641901820.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/90212886959.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/42759935386.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/dapifizegu.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/xabesu.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135426bba827---19054152770.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/47753318861.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/mopisemiwu.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/99308530751.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/mosotepane.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/93461479221.pdfIn PDF document text
    • http://vlajamo.cz/images/file/24534363937.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/gosuje.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/42136752997.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/birupuzoxagedazizofigux.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/11425684047.pdfIn PDF document text
    • http://wirheiraten.de/images/file/16213246241.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/31680241769.pdfIn PDF document text
    • http://iccarrentals.com/files/file/ligofomiteleva.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/jasorudubutufelunisom.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/wemikedofitijutow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+do+i+change+my+caller+id+name+on+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BE 10740 bytes
SHA-256: 39403c4613089b405292630c5894bbfa11c9b234daa32f294de5e8b599726d5e
font_02_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 18064 bytes
SHA-256: 6459166ef69281112916680a0f945c385c6e783388d69ee9542de1132f5d089d

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