Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bc9d9b5dab76f0…

MALICIOUS

PDF

79.1 KB Created: 2021-09-04 07:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c01913f61d8a8497cc72ad8cf62fd481 SHA-1: accdd0bacf7ba0fe9aa4128927f96722b064e5a9 SHA-256: 68bc9d9b5dab76f0eccdfb258ee3fe10b21a885b95c78b0551b0eb4a47a460ce
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to lure users into downloading further malware or divulging sensitive information. The presence of multiple links on disposable or compromised hosting reinforces its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b78e6611e---27040357091.pdf In PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a46afafa9e---56832935717.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/palunenu.pdfIn PDF document text
    • http://mestan.by/images/file/rotupepexiboxarulukudaw.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/94f18e43e68d5b8eb76f686a6cde7571/12493055873.pdfIn PDF document text
    • http://wmhsclassof1977.com/clients/34196/File/defuzutokefowoveg.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb36f947e3---93677270393.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/rf2fernrtucou9nudfmoj5mgd6/81224814875.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/96d82266b4a803cd94079edaed61f408/savaperewelimuwezu.pdfIn PDF document text
    • http://lejonhund.com/upload/gajom.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1cf5a50e1c3df368d30165ce6958f33f/gumesidejanuwimap.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/wakepedirere.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160766ec476b59---26911085518.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/nasofutagifibexagatatavi.pdfIn PDF document text
    • http://harveyfamily4016.com/clients/5/51/51a16c7d09a65bdad6d3cd8ef7da6b4e/File/famemokuzozebede.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/37038267741.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c066a0cf86c---godibugokiresum.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/35489572492.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/pagokuripumafekibek.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ededa113b---dedaxixelavulapexit.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/fafuragovor.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/42632870958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=shredded+workout+program+pdfPDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/2070649449.pdfIn PDF document text
    • 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_off0000d0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 10888 bytes
SHA-256: 76d15bb82e5a9e530835a47cc58e5634c1bbaf579359ad6e55e9301c77dd5dac
font_02_sfnt_off000101f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 17204 bytes
SHA-256: 274f0b747e396f42627815447b3868a906c15cc474a53e3cbff823257cc65cc7

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