Malicious PDF — malware analysis report

Static analysis result for SHA-256 12abe73eb4c2676d…

MALICIOUS

PDF

96.1 KB Created: 2021-09-02 15:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 22d0a1511bf5027949c40a4e20b31403 SHA-1: bc9a060aa601e085290d2204bf5cef2601eda8e6 SHA-256: 12abe73eb4c2676d8e713c6a08ded4a43d23e9155f4b8121f418bef536d50ea5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

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 https://rimsball.com/ckfinder/userfiles/files/zimafojegu.pdf In PDF document text
    • http://bienchidan.org/uploads/files/setadijukanofisonejo.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/tujadipokuzobabuputol.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/bufuwotijopawanuwupe.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160848e828aea5---68382505323.pdfIn PDF document text
    • https://dintek.eu/uploads/file/25485481332.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/ea7daf4399dd4088851ce4ea5cc5666f/vogazog.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/batab.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/norobax.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/67558512976.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/64773387498.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/regaju.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b368cf9e---59465212158.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/3c6ac6b87b1265493f451367d600fd06/58175373054.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/nizezigalelek.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/88cbc9c1658aa66d19ccd36c56ca8883/fetesikap.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/45215087005.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609227331156f---gojudogobamipariduze.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d0c29bc8f---lutolutikifo.pdfIn PDF document text
    • https://micsys.in/userfiles/file/dilinugowodilep.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/rn854q0pq3dvqtj759hjrl5tr2/69024686172.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210608_C2CDD21734BBDE91.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609090ab74bb8---dasifedorusojigowel.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4bba94821---xozit.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/a9ac13b66df79819ccf7f0381c6669c9/83265347893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=hal+elrod+ma%C3%B1anas+milagrosas+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 10940 bytes
SHA-256: 3814d4a111f5ea09a300525b91bac672fa2f29eb440b9dd497ee0ca9a2b71227
font_01_sfnt_off00012289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9B 20992 bytes
SHA-256: e70d193c30bfb3b3f900b04325943a4f461a875ef0ab1da53a657200d2532c2b