Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6e308389e9ac21…

MALICIOUS

PDF

78.0 KB Created: 2021-02-14 20:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 63894c1ccb414157aacfd752f8b9e6cf SHA-1: 7ffd160b1a562b340a82b3600b679308948b2dc5 SHA-256: dc6e308389e9ac2149ab39ad971a8585d448847dfc4aae843f9e746d8662a0e2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's content is designed to trick users into installing software, a common tactic for phishing or malware distribution. The presence of numerous external links, including one pointing to 'baarspo.ru', further supports a phishing or malicious redirection scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://baarspo.ru/wix?keyword=apk+uc+browser PDF link annotation
    • https://jurozujuzofu.weebly.com/uploads/1/3/4/8/134875655/juvur-tubuzonodefodu.pdfIn PDF document text
    • http://vereffka.xyz/19420107118b4jtj.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/nelemoxub.pdfIn PDF document text
    • https://tunizobun.weebly.com/uploads/1/3/1/0/131069832/lozobunogilulip.pdfIn PDF document text
    • http://egosikenclub.com/10481652934ycyrn.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/wugutamiroju_xovuxuxata_ridawu_lefenumotav.pdfIn PDF document text
    • https://towavakivuno.weebly.com/uploads/1/3/5/3/135318123/memipujulatibi-pomuledobodige-xiduwi.pdfIn PDF document text
    • https://kofezewi.weebly.com/uploads/1/3/2/3/132302944/pebupebe.pdfIn PDF document text
    • http://yourdesk.website/iss_pyaar_ko_kya_naam_doon_online8enkn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_60206b307d9ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wujanozo/33687353206.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/zibijupisamomadewogor.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/enzymes_amoeba_sisters_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/cute_panda_wallpaper_free.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD344 4616 bytes
SHA-256: 6cb4e3d879bcb2d957b3ec343a7015999b82d1aaee95c829e6ef48a44b7612cf
font_01_sfnt_off0000e307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE307 10576 bytes
SHA-256: 74711114888f681d947cbc75ecfea14533664caa24db65b31450fe17ebd0d8d1
font_02_sfnt_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 16296 bytes
SHA-256: f18bbeb39ce0ec1069eeb9033ef9d17f1cf20ced6faa2b20464ee46a840cf745
font_03_sfnt_off00011ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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