Malicious PDF — malware analysis report

Static analysis result for SHA-256 76483b11f5e18abe…

MALICIOUS

PDF

86.5 KB Created: 2021-09-09 14:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 9eec201d14ef8935fd25f13eb56428e2 SHA-1: 5b15a00ef5093b337360117a88b7d0dab2d1bb05 SHA-256: 76483b11f5e18abe6887f7ea3810d664c0af5064323d12a08f9764fe2fad7e5a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=black+magick+of+ahriman+pdf PDF link annotation
    • http://phupmirpol.pl/userfiles/file/rujewibegopa.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/44507410096.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/99163442774.pdfIn PDF document text
    • http://fatename.com/uploads/files/202109061850522745.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/39854792401.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/25300463379.pdfIn PDF document text
    • https://seerupit.dk/assens/file/kaniloluvunodowusamur.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luwet.pdfIn PDF document text
    • http://orthodoxnews.us/file/rusumuretezomow.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/61724328040.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/zikureganizamavul.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365f96524d1---32630697885.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/filejewuraw.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/84496409576.pdfIn PDF document text
    • https://irantruck.ir/data/file/perus.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/rurojesofazobumuvejuged.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/wuvarisubebino.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210907122314.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/75298475882.pdfIn PDF document text
    • http://stonebreaker.at/17473533166.pdfIn PDF document text
    • http://meta-min.com/files/kevizitojosasor.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/25935252343.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/neminobifafumurileju.pdfIn PDF document text
    • http://only-svet.ru/upload/files/xiwomapijezaxazusikujafa.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210903_22398D78A270FFAE.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_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 10812 bytes
SHA-256: a9f78b9147697f0e6f64f6936c0e7b4260f1e1f9f9aa4dc4dea458da087defca
font_01_sfnt_off0001027e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027E 19216 bytes
SHA-256: 63ad3a5c7e7f2017f7cb6a7697e98a0a437e83e5176b223bea283fdda0d10346
font_02_sfnt_off00013471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13471 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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