Malicious PDF — malware analysis report

Static analysis result for SHA-256 095e0104ebd31719…

MALICIOUS

PDF

76.0 KB Created: 2021-09-17 17:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e9ec953fffe1ae4e80573b33a280b212 SHA-1: 949362a84d01a27633f7443fdbd4f10293b36527 SHA-256: 095e0104ebd31719274a130bb5579080fa3a3baf2d77357bc1797f91fa41210b
126 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights this behavior, suggesting the PDF's primary purpose is to facilitate phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://mobiligennari.com/userfiles/file/xewadikadotosibosemaga.pdf In PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1d66690c6---37560779262.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/54656351751.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/15021719331.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/nolibemusodevemeralo.pdfIn PDF document text
    • https://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/99009301788.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/96840544768.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/6109117118.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/54288281989.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/posilomodopemuj.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tenabok.pdfIn PDF document text
    • http://zgic.ru/!upload/files/26149676744.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32604452956.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396b12aab3e---tapavejufa.pdfIn PDF document text
    • http://jump360.co/upload/files/20210905152135.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/mavibob.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/9375712263.pdfIn PDF document text
    • https://clubon.top/uploads/files/99783791184.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/76682208332.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/vogazuv.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/gimej.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/92044961010.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/72397289973.pdfIn PDF document text
    • https://iwistw.com/upload/files/ranixexenipap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=netter+human+atlas+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 17132 bytes
SHA-256: 1c2fd10ebc4bfb61e67c9cd2ebfe2d0b1705423c8f622fa78ba3298be92f9775
font_02_sfnt_off00010a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A94 10628 bytes
SHA-256: f8e1980f5bdb6b77c1a8b9b5657717e6ba6f4b673e67c2f40cda8a091841f7b3