Malicious PDF — malware analysis report

Static analysis result for SHA-256 232d36f0fac47d71…

MALICIOUS

PDF

85.8 KB Created: 2021-07-03 12:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f5427414bbb01a32eca7452d7fc188c6 SHA-1: 0b01d4f732da52d70b3a352edeec4c75051226bc SHA-256: 232d36f0fac47d715ddf6cc8ec4fdc4947eb733ca35d1ecf2b389ec4a71ab8b2
176 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and IP addresses, indicating a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pelicanfinancialnetwork.com/ckfinder/userfiles/files/32295033673.pdf In PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f47b514245---wimuwakazoralonuji.pdfPDF link annotation
    • http://tlxzkj.com/uploads/file/180850283736.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/fb0b99fe14fd5b1b4d5afde0e6fa1407/73281551289.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/8tn45cts0n9b3q2q764mou9t80/1405554524.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d787003465---82621033018.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/41260095109.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/d0cv4h3ncqk4f5ik5iidnbes15/98587301265.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/vulesa.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/40093328420.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210512102558.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/155dc25a5e1ab0f3a7f87921b81e949c/dofotipukudaguxu.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/5tpq70va3ijr3spetj4t6l4sk4/62700153249.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a371dda7d74---tetozujubofa.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/89528675225.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160844a2994b2e---43351989889.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16076343cdcd12---7591597101.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/22421478249.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958d4e2b2e0---bivewiligedubolofumal.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/31970613054.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/jevadam.pdfIn PDF document text
    • https://citytrafik.nu/images/file/87869495206.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/5huqh93nbqml0c3frts83ccnq6/dubab.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210624_093139.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/valudubixizivafezidu.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/bizutovuvew.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210624_C5EBF7B27E967E5E.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=the+shard+of+glassPDF 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_off0000ee01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 17204 bytes
SHA-256: 5ea182e93e7d4fde9c1abad5a8d568d7f53284921334de5f9d03e1e73db6f1fb
font_01_sfnt_off00011ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132ED 10300 bytes
SHA-256: b2bf7f7d63c601653a4b763f23767f0da88daf239e195bee779db329c0881323