Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c1e58e2d02dec0…

MALICIOUS

PDF

69.6 KB Created: 2021-10-03 12:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: fac4244b21e99023b5cb9e6294a844cf SHA-1: e25b46b91f3855c6e6db6832a23bda53c5106898 SHA-256: 29c1e58e2d02dec08840df58ca4b75e4dad5659d79cbc3ac8d5e21e04e4cb482
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads 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. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crysiq.ru/uplcv?utm_term=champaign+county+bookings+mugshots PDF link annotation
    • https://markyatirim.com/resimler/files/kamod.pdfIn PDF document text
    • http://izmirtavla.com/upload/file/benek.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210925022635.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/17569941789.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148854a95a2b---kivujidodokowusife.pdfIn PDF document text
    • http://xn--spreewaldpension-lbben-9lc.de/meineBilderAlbertGrundschule/file/parivasedevabuvagapi.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/74209169842.pdfIn PDF document text
    • https://semut73.com/contents/files/zijojexeputivin.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/pasefakuwemef.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/zisabixebimovek.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/64077336501.pdfIn PDF document text
    • https://photopoligrafic.ru/ckfinder/userfiles/files/kotizapesuzovosaxe.pdfIn PDF document text
    • http://reylab.com/userfiles/file/50669956293.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/neninob.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/gunoluv.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/jobevoxuburo.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16156170f8c48b---fuxejavupi.pdfIn PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/53734978055.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88805366282.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/5117234682.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613126ce90baf---xatixibamebuzadolukonopid.pdfIn PDF document text
    • http://thehbbq.com/uploads/files/28384029187.pdfIn PDF document text
    • https://035620126.tw/upload/greenkitchen/files/19225620269.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/59222769533.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_off0000b11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB11F 14536 bytes
SHA-256: 0eda7485fc295e9d8eba4a388664c890cffff99b7cfabe25b0c15c61d0db9ad6
font_01_sfnt_off0000d586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD586 11020 bytes
SHA-256: ab8ea9c3943c8eabe0a3b5aca540ccd350c946dcf102db31555126d0652300f1
font_02_sfnt_off0000eed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1