Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b18b013a5383a8…

MALICIOUS

PDF

85.7 KB Created: 2021-09-15 15:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5f27d5a450f4442194f04c6650007e53 SHA-1: e2d545c506a0651f59752a539923023b0e7ec0eb SHA-256: 89b18b013a5383a8c207727410d85a437abeef58e32c9a171c4ad0ec80d4305c
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 0.9912

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 https://smidgel.ru/uplcv?utm_term=sms+wiederherstellen+android PDF link annotation
    • http://bbhshipyard.com/userfiles/file/36184870073.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/87377229426.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/lojakafaw.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/26312601549.pdfIn PDF document text
    • http://erdbau-rauch.at/nedotagozumoxuboxa.pdfIn PDF document text
    • http://wuchem.com/upload/files/fegoboxanegepop.pdfIn PDF document text
    • http://sswjeans.com/files/43824363002.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/39154001395.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/jadukasugejovenuwofisas.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/23157611737.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/xefoduline.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/diwaxajimosifixofovon.pdfIn PDF document text
    • http://dinhvi5s.com/images/newtech/files/25683175460.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/45278282150.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/52420874318.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/9714194593.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/pojitekijojefe.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/busiruzibozo.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/xiwowu.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2ea86be51---88064970068.pdfIn PDF document text
    • https://vhcvietnam.vn/ckeditor/images/files/monojojefubajov.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/dabuvizupit.pdfIn PDF document text
    • http://headrepublic.pl/images/files/25648489632.pdfIn PDF document text
    • http://primaneighbors.com/userimages/gerasopoxorax.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/kogifevusoborajokufokusu.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109121512364271.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

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_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 10676 bytes
SHA-256: abb4fba946a031cd3353c7f6e9af2c4564509462fbfb369ca5a9525b61a1898b
font_01_sfnt_off000100a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B7 18392 bytes
SHA-256: a1a5183c5be16745e47e998e7a4bef2990880ecf352369adfc297689ac4d68fd

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