Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b46c09acc9d757…

MALICIOUS

PDF

106.6 KB Created: 2021-07-02 19:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bb276bbaa61917ca250e1b99f456f47 SHA-1: 91bba2c9d02c78818c79a530c1255734282df34f SHA-256: 62b46c09acc9d757d2c4968436dd5106f749f460d481c03aeb06619606167c2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

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 https://pistant.ru/uplcv?utm_term=im+sorry+dont+leave+i+want+you+here+with+me
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e2412b7e6---79265991546.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c913fcaf544---1706988270.pdf
    • http://bright-inter.com/file_media/file_image/file/33124871286.pdf
    • http://www.ipkameralari24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da91b483618---ziworowamipuvuxipiwaj.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bcb8d4f21---titokusafejatoxenosutez.pdf
    • http://calhi1977.com/clients/879053/File/54101687700.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c841112080---fijapokapuzuralerujofunak.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5900d5db2---wojilo.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cee02510b0---25051809243.pdf
    • https://samowar.me/userfiles/files/84821373018.pdf
    • http://kantoromega.pl/userfiles/file/5680864306.pdf
    • https://meesens.be/KrMee/Tekstverwerker/49648300686.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b691622110f---xalogerisibogudedowex.pdf
    • http://www.multigacos.com/admin/uploaded/fck/file/venofoxodinizanujanupu.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16074963611a82---suwiliropagoveduwe.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9430bcf0e---7030741266.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad1a52d426---49935887899.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b850d6ad8f7---99847472002.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084afa14fce2---roxasewudemo.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f92aa343f---38910916646.pdf
    • http://cga82.com/admin/File/52414915.pdf
    • https://aletihad-group.com/userfiles/files/15289713326.pdf
    • http://metrokentakifinan.com/resimler/files/15612489028.pdf
    • https://dineflon.com//files/15062647306.pdf
    • http://mcutech.net/files/xaxuxipip.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011689.bin
0088b6e72ea18441fb1c975846ba4809cf83e2a233ad5d291f8f5b780843d6d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 16336 bytes
font_01_sfnt_off00012ce1.bin
4285721d04e3a428f1e5846e975462698d72ded6c179bb624096cfed1c365ca4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE1 10828 bytes
font_02_sfnt_off000145b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145B5 16792 bytes
font_03_sfnt_off00015dc7.bin
1ac6606a2a579543475ba7b45f5ca7f1feee1cdcadb1cf458262fc1d5f16d4d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x15DC7 31444 bytes