Malicious PDF — malware analysis report

Static analysis result for SHA-256 84668d75f8055227…

MALICIOUS

PDF

87.0 KB Created: 2021-06-27 07:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 220ffc489bbf82a9436d20972b145bbf SHA-1: 81111ac19cd41492e6a3ab8e610d0b6125e1ff91 SHA-256: 84668d75f80552277d37ea82911fcff40df0174b8f7b197a00a3d6ae70dc396b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings indicate a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/7659f0013fcbcc8ef02a052e5aac5848/14425965187.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/32837d9f6e462f4c4432fcbdfde71c92/kafub.pdf
    • http://myappartement.de/web/editor/files/45043582323.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6b0cd99d---javujerasexovulofap.pdf
    • https://cr2tek.com/userfiles/Proj_Name//files/zuluxowadafamijoka.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c33bf341e8---39229941615.pdf
    • http://exhibitionchannel.com/upload/53032181608.pdf
    • https://autoparkalbanese.it/file/wavipotubuzukatobefo.pdf
    • http://videofilm-tv.ru/content/File/mugagaporaliwo.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfda19a6cea---81462269190.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0f30e8627---2364817802.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c569862be45---72990985532.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/v2p5d4rai0mueruc75a5ulbumd/36898428085.pdf
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/wirib.pdf
    • http://meruzhankhachatryan.com/app/webroot/files/file/8476913893.pdf
    • https://tahubunting1.com/contents//files/29927457894.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fd519f099---jetorerapajinexadagetat.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/oiut6cpenob7qj5cqbj9p0pv1j/56860897578.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/f219893f1e8a21f2a9fc579402b33ca8/20890999068.pdf
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/2fc26a573a400b24d591199a2ff18276/95666672673.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/04a3ab05c95d59bc8d8fc2a9a9bd4352/40178399832.pdf
    • https://allmassage.net/upload/file/20210522203200.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/8gc427nqd5550dkl0islnbmdh8/puwizuxexedaxugel.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/72887688275.pdf
    • http://fitsiluet.cz/data/file/60064571172.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dd2c210ab---1110416268.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/2825245f1911810bc52b23932cf71e0d/gibovigakofif.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=all+garage+finds+in+forza+horizon+4
    • 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_off0000eef0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 16792 bytes
font_01_sfnt_off00010707.bin
0c4b8c6bb6fd8cbb82796da89d387f3b6a68e643c9450f901d339d03353ef004
pdf-font-stream PDF embedded font (sfnt) at offset 0x10707 10652 bytes
font_02_sfnt_off00011f27.bin
6b833b036420d0d8c088c886722288437a17339bf520a6ad65d703fde1631e5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 17344 bytes