Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ecb58553d73003…

MALICIOUS

PDF

75.7 KB Created: 2021-09-13 12:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: acb7b5850d3ef454d47922ebbc23356d SHA-1: e5254b1d84b9e7d3f24a2bb9706485be1329d9a2 SHA-256: 05ecb58553d73003564196da997268035a3a706cd88883026e811fc9465a86c0
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 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://dhf-china.com/d/files/dixirujixipobuwafe.pdf In PDF document text
    • http://powerfalcon.net/uppic/files/vonojolixalovivinar.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/rutagarib.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/7670146426.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///rikerezolidivabutofigofo.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/zogineg.pdfIn PDF document text
    • http://flathead.herosuite.com/userfiles/file/24436473965.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/69141227889.pdfIn PDF document text
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/razoxofetiterodegag.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/bokukifexebel.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/90319604166.pdfIn PDF document text
    • http://bscartridge.com/pic/xasuvoniruduzeroweso.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/23975281584.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/61961681446.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/88195480866.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/35925254937.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/66477586288.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/68815858759.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/57354231860.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/bukup.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/regerexate.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/31013137602.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309775885e6---wezixiruxerigekuluzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+dude+in+me+full+movie+eng+subPDF 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_off0000c282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC282 10708 bytes
SHA-256: 1cf76fa2e1be4e2086c64c2f612f05790c5c72008bb0551b359cd670be0fcca3
font_01_sfnt_off0000da9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9D 17624 bytes
SHA-256: f942b2bc2565489bec0af3d762e6d1f866ba1acecf367e16dd871037933ce7fb
font_02_sfnt_off000108e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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