Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafc295dc85fbfbc…

MALICIOUS

PDF

75.6 KB Created: 2021-06-27 07:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0cfe0a81d49b0c6586d9703ccc3ed131 SHA-1: 93b8bab570ed6b15cab482fe2c077d08ef972688 SHA-256: fafc295dc85fbfbc94745fb82ed712b5167a9df836072e6fef66a566f2aeb6dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to malicious sites. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

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://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608896ff7cdf1---lumoxiwarim.pdf In PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/u1hvpsatv1taf74kncg46d0v8o/vunixurodupuzozofaset.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983fe36a0b2---91060487977.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20215138307206.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/3rt5jg4tte9h6eltu9dlm9hrq0/66387353900.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/5547161cfa69e3b2e08b80f77db09f5b/ruvijiwo.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/3796b3b0b11abf65cca2524593ec689b/48857640081.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/15445417100.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608358eb4de18---65782498591.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/vovikivapatiwu.pdfIn PDF document text
    • https://langumeistras.lt/i/File/demekopejek.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/96220861775.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/qd5c72sgp3bofk91jmpo9bv3s0/53655951834.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/29232279326.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/bb7b269d5b20ecb94595dc6b4ff03f94/tupunafiwatexoti.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/kf577dbf4qaln5lt3m8lco5mj2/75798385335.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/zulitawiwilobadamilamam.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/cbf98ebcd1fe4950b36d377979c171a5/51630832832.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/3736778241.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ef08edn4epc1rcpakh8sc6k9oi/95474084456.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/butegokadebujoxekavutasil.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899c55a2e2c---93732589904.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/tivozikimutu.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59b0c9d6b0---45240587993.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b40f1e584---94819128720.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=by+my+side+meaningPDF 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_off0000c5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ddf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF7 10396 bytes
SHA-256: 52402d8b63c4189ce89cb8dd0ae278ecfd6349c2d606394943924e7bd6803953
font_02_sfnt_off0000f538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF538 17120 bytes
SHA-256: 3a4589b59e17663bdf0632ca3033b6fba8c8efd3d568bb28508c613fa4e4eb62