Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fd9968c6242ce6…

MALICIOUS

PDF

75.3 KB Created: 2021-09-08 06:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6587a13064474af23adfe3131a15d841 SHA-1: f083c16e079582817faeab80226b203f6a9a5b48 SHA-256: 84fd9968c6242ce66c488982e39eedc6f584b7613467d52c43f5113af978ab16
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/dda3eb4c4f84ea35b9cf4679ad886354/18468477585.pdf In PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/f1a5ac4146f7cd2354b33d3a320bbb77/rutawajirozepu.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/papilum.pdfIn PDF document text
    • http://starlightcelebrates.org/clients/4/43/43e9139217482d7666ce300faf566241/File/23987070388.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/69888385844.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/94352412356.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/52273060841.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/jujuxosoda.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/44015611460d29adc05398.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/xukafevomed.pdfIn PDF document text
    • https://penal-garazh.ru/files/94841210553.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/lajor.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb06724fad0---93493085309.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/lhve3g35d67f1s5h7jchi84na3/46081895962.pdfIn PDF document text
    • https://5udua.com/contents/files/puwifujaw.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/96621101552.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7af75a553c00c75a969f7589be65cc3c/40353478176.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/15045014925.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a846b529d57---xevadodopilitumef.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/60039037736.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40e66ad309---54053341859.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/zawodibewelofatozelorit.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606d073306085---nakubuxusifi.pdfIn PDF document text
    • https://htchninc.com/d/files/10481709033.pdfIn PDF document text
    • https://egca.fr/userfiles/file/fabagusozejetofesoru.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/te01mogubgbkmm61jculn7pfl0/77843850927.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=mandalas+de+disney+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_off0000c236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC236 10280 bytes
SHA-256: a9d1ca21415ba9380a60372bce437a919fcc9952aac580e91f864dfce662bafd
font_01_sfnt_off0000d95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95F 18224 bytes
SHA-256: 2ffee32a06573d5533cf9fa1e699c76fadd7fe8e3aec80fd67d567cbb000caa8
font_02_sfnt_off000107e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1