Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b2b5b34dabd0a1…

MALICIOUS

PDF

68.6 KB Created: 2021-05-24 02:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe1741207c87ff14a4cb6036e14f6a61 SHA-1: 19d73aed754892a83d579415b5056ec34b7e6623 SHA-256: d6b2b5b34dabd0a12abe7a57e8a1264c18f6877f40fabbdd8577a6c9fec0a9cc
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9785

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
  • 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
  • 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://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/9t6ru7rigp12ubdk8c2dsvp1todlnels/85469295450.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/1a56f29efd5a57c86854a3c02a60980f/webozekutotawojila.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac82ce5ccd---paletesopezoxobakasajuza.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/d3de03f5a38bd6dca894eac8e20642fb/marer.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f14861639---warobugepinepufuxa.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607840d7cfee9---32483575181.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608700e17f1cf---26999940164.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbc2f0a77b---xexafozavusupebofibosonud.pdf
    • http://apexibd.com/uploads/fck_uploads/file/77586882446.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee1921409b---rapanonopewutot.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/22ac5bc3108b16f58298c3229b018361/48212486406.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/d25d957f24df4fdded20b886d3b3f9d3/nexenugabizuzelesozake.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763207ef9a1---48869287035.pdf
    • https://alatheir.com/atheirwsfiles/file/vivipewikawib.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59e8dc257---lirabowazuxinafetegapep.pdf
    • https://isosklo.cz./uploads/kisonasejafev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ejercicios+con+palabras+homofonas+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddca.bin
9da101b8dbeac057789cc4a05c236ac78ee0c05d9a03c1f207dbec94b453a554		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCA 5568 bytes
font_01_sfnt_off0000f08f.bin
a57892b829ea16928b7f265abcf17a38c1df5035e9ebc455d68eefee1a7a9513		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 11612 bytes

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