Malicious PDF — malware analysis report

Static analysis result for SHA-256 060f19690a1a016c…

MALICIOUS

PDF

111.9 KB Created: 2021-08-09 03:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c1332c62f9231005811334f528aebd43 SHA-1: 1c5eeebd05a1892061479af18edcaf5684856df6 SHA-256: 060f19690a1a016c2b6964660745dc4196a378ced448fcf6e81b17c2cacc80a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and link farms indicates an effort to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://ackerviewguesthouse.com/userfiles/file/41922117179.pdf In PDF document text
    • http://gfb.it/upload/fck/file/fatekaxig.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161005120e4328---vagipajadabupug.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4ddc12ff3---nejifedafuxu.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/n1oct7be9svat80gmt2mh7qq28/90583485060.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1609785e5e3011---7533007461.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/410475d81e993641ac517aa3a65206e8/18680259420.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3fac2a19f---zafasasemul.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/13208095408.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/62589040790.pdfIn PDF document text
    • https://micsys.in/userfiles/file/18613546234.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/lorinomosiramifawi.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d956b0a378---lakibotojesimafuwotokex.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/h6u7v616mdfsaklfsjv9m8o95j/8689219213.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce86271b08---7149458284.pdfIn PDF document text
    • https://bauarch.bg/files/ligibapurasonufu.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f12b1fa213d---sopagisefaranije.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/fugavemadep.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/8843057650.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/t07489akfa78m0tjhciatip1qm/kitopisak.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/86f6674616b3235fcdc9d7ba898c0f3c/nekudinalawageg.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/rojuze.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///69115668335.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=libro+de+matem%C3%A1ticas+primer+grado+honduras+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14281 19492 bytes
SHA-256: ceaf1baf0a3a81f566c5b48cf87cd4e0a1e3d38683795346164d2079ae5274bb
font_01_sfnt_off00017492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17492 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CA9 11396 bytes
SHA-256: 0b58d43a56614d6f8adbdf420ea2e63aa3681c80acd3519c46f4a9eb411def95
font_03_sfnt_off0001a688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A688 1676 bytes
SHA-256: 08d3d5576007ac795ae6719f21099a96d4af1de6057acb6b0f60637119274493

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