Malicious PDF — malware analysis report

Static analysis result for SHA-256 9beb2b8758ab3ece…

MALICIOUS

PDF

84.9 KB Created: 2021-07-02 11:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dad5321eea816c2cbffd4a73783d76e8 SHA-1: 81154e99da44ae7a434390f2430d25970fd8559f SHA-256: 9beb2b8758ab3ecebf4881254e7875db098ed9974b2931170c109e3e87567f46
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by numerous embedded links pointing to potentially compromised websites. The high number of external URIs and the ML classifier's strong positive prediction suggest malicious intent. While no scripts were directly extracted, the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/g45tvq8qagoc2a11sum1jmi83k/73135541375.pdf
    • http://oilandgaswork.com/userfiles/file/93653780686.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/03jls498ipr7t44vro0hko6dv1/norejekojisut.pdf
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/98948445625.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608954972070d---foxudisezanufozunav.pdf
    • http://enjoy.sk/editor_uploads/system/files/24963078373.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/c43ada85ec84771f1e042698cf8e2a4a/70851857298.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2011b33510---paxumubovogudajanilo.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/4c330462cbd78449d9767aa015a571e7/zenilevezepokitonulelobur.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b4499ca4f---wusidukosid.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acb92fb4fee---gulaxojupibif.pdf
    • https://culturasiapamplona.com/guiarte_userfiles/files/mofidopikarugiko.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd85a45e0---musezogetot.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/7od8p8qfer05uemhjs1se2n5l5/13341564280.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aef7f4bf92---24321797422.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ec38c41c0---zidazuziwipajuban.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8c7b63615---powaputefegapakofi.pdf
    • http://kibbkw.com/uploads/file/sazavimonaz.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609299877edee---purejawewakosikutelos.pdf
    • https://alakharia.com/public_html/userfiles/file/43568060854.pdf
    • http://metall-press.ru/files/2260845347.pdf
    • http://bookblog.kr/data/file//files/69433653255.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c77ee38e3df---zojirolososirokazed.pdf
    • https://fenixfalt.com/userfiles/file/61100800291.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=eight+of+fire
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb29.bin
c13039db4e14d0026a59b5c4c240642ae22c792942b63e0f40c1a5a53f7743d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB29 16896 bytes
font_01_sfnt_off000116f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116F3 16792 bytes
font_02_sfnt_off00012f09.bin
844078b67f6c638b16b41c3baa5f8e87f43224b5ba3f7bb911e72feac64ddc45
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F09 9996 bytes