Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eeedb0071a0fd61…

MALICIOUS

PDF

91.4 KB Created: 2021-08-07 13:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ab731cfb134721c32cdd5d1357c321ac SHA-1: f9fb549ce7165b960f02db60e9d960f7e013b852 SHA-256: 3eeedb0071a0fd61e237e162f9ea77df4699872e4fbd7228aef101c19fe679e3
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of numerous external links strongly suggests the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • 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
  • 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 http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c55c09bcb384c16a56443b56259e04c5/8556358417.pdf In PDF document text
    • http://riviera.az/userfiles/file/fasujebipama.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/2adde0bc7c76cfa9684dd66b26376a49/vonitoxebowitisezifotiz.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d76ef330---32418677990.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/wawopeleti.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4e3dde236---matefibamuxugot.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbe795e1e5---jobulezuxulojilikomotinu.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/98332751714.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d82892e68a---77002070463.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e4262b1bf24---divosuwatezenunu.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eec9ac603---suruzekizine.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160e7bae7b8970---pudoxaka.pdfIn PDF document text
    • http://m2mus.pro/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/92289951190.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/46884003134.pdfIn PDF document text
    • https://epos.nu/ckfinder/userfiles/files/5998207626.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/3924049519.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08424a98d3---wopeje.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/91138628824.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c172ca8480d---vuzoxafixafafa.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8113645f2c---bivizife.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0d2df15ed---gokafedudoziwugepizobaxet.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c080f2d734b---rapasiwiwora.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160cb481de249c---xejuzavu.pdfIn PDF document text
    • http://ailizia.com/userfiles/xodebilirejebixubolugopa.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/pawifilivemafixireruj.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/84462467907.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/9mlkdjdn8h22dc0grkc9ql1om5/66594270873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=bruno+mars+marry+you+video+with+lyricsPDF 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_off0000fbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 11056 bytes
SHA-256: b096bea771bcfe49b156608a6b9c4f2550620f4d05a6e646c892b73bc69240ec
font_01_sfnt_off0001155e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 18548 bytes
SHA-256: 6be31f95a461f54319613d39f351e2bb019da4be78668e094e9c1f1be7db0a34
font_02_sfnt_off0001469b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1469B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1