Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c02cebb38471da…

MALICIOUS

PDF

89.3 KB Created: 2021-07-25 07:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f9603d668ce749639979b9edd671c330 SHA-1: e6ab999e02eae27e46c0ea4444e056846e871ed6 SHA-256: 72c02cebb38471dad633cfd92e739042e437935779ee351b815a542444d5c688
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous URLs, many of which point to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users. The presence of these links and the overall structure align with a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a4be290a6bebe5a8fad147ca975369bc/51131877697.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607af069367f4---zebexixumiderifa.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4141e70bb---19741350749.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/visekavanezijusogodoras.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/xarutodetup.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/15ff855c13ae46dca7dd2a3b0c4ac02a/velogawereguwalapisatinu.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/257656272ba97fd6006fecedfc24224c/43710446258.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/84393641549.pdfIn PDF document text
    • https://mszukam.pl/dat//file/budowuliziv.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f490e52d---nakapu.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdfcf01bfb---poxilato.pdfIn PDF document text
    • https://lemanssrl.it/file/11681536960.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22f10d1be4---89657473010.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aebdb71c6---93472273862.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/fimatiken.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202162744145570.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/sugiferilutakukulimeb.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/16483503860.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8323a322e---fuzevejobunirexorirenu.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/ximifezokeviz.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073aac125f0d---zabadaxedake.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/revun.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c34c7e0d3e7---47450661180.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/37860519792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=compress+pdf+file+to+less+than+200kb+onlinePDF 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_off0000f8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 17252 bytes
SHA-256: cb169817b26c4b0ef3bd18b7c93d482a921fecba791e6d1dc622e4bc7ad2ffdf
font_01_sfnt_off000125a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A0 11268 bytes
SHA-256: d8bf77694c16aa1a0c3820fbfc775cac45e537ec5029fc4cbe0ccce6fb9422bd
font_02_sfnt_off00013faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.