Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b2807ee2ac25b7…

MALICIOUS

PDF

84.9 KB Created: 2021-08-10 02:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 95eab4268141c7d038c25723c710f13b SHA-1: bcda9ffc12f6750d1be9b543136d0026b32d957d SHA-256: 63b2807ee2ac25b7b170f492c9898e9be962cd62bc25bd26b35ce0138744a027
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to potentially compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854e6b104fa---lisirazikazedova.pdf In PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/41147962517.pdfIn PDF document text
    • https://iohrp.org/f_files/files/radafosujelarivuxajazirej.pdfIn PDF document text
    • http://absigorta.come/file/suwigolesenovodut.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078034945111---55260298794.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/ledufowaf.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/4459785615.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607621cd39c04---runitakaxenusijejes.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/79278797001.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/93638689870.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/46989999095.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/bobuselorejomola.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/nugelufudivu.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/36159980249.pdfIn PDF document text
    • http://bivalyracing.hu/files/file/gabekovumo.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/70285341224.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062403221396.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160940b624c71f---29254571085.pdfIn PDF document text
    • http://goldmustang.com/files/files/56363104483.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/31002788150.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/fefekakopete.pdfIn PDF document text
    • http://viajesalaos.com/webroot/img/files/50678994827.pdfIn PDF document text
    • http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/11268563241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=first+earth+battalion+manualPDF 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_off0000e67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67F 17668 bytes
SHA-256: f8a0c1b4c62f7d956d5be7f029336b6e4bd595e82d1fc1ec4bf3985836fffd4c
font_01_sfnt_off000114b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B6 10592 bytes
SHA-256: 40e0c17289136d138e84a9e6d74fc93a34d4552a7f3110b42a0665686339dcbd
font_02_sfnt_off00012ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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