Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29b70a252f0e328…

MALICIOUS

PDF

84.4 KB Created: 2021-09-05 03:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 37403546f10700699d022273940af742 SHA-1: a07e390b539a9b73c2bf35af50096bc331e79fe1 SHA-256: d29b70a252f0e3281f08994427e2305b358920cbaed883f878642c2ae8b8487e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external URIs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://anfauglir.com/images/file/tusopav.pdf In PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/pumajagipekurisagizelamor.pdfIn PDF document text
    • https://brod-plovdiv.com/images/pedomikodaxupavaju.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a16afc63701---relejadegidifufararazil.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/110ef1c94c5a8631ba094531790254e2/dabedefixoxo.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/tegugaxa.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/pavizaruvit.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3e2089f21---40508774483.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5d4d973b0---mujebunewu.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/zibazezidegorilupiko.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/kutapivikesov.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/60387614049.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc77589d5---39541963175.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/xuzuda.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/meweg.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/76792802708.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092cd97131f3---kowoxud.pdfIn PDF document text
    • https://parfumzone.ro/files/file/13840159178.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/balolilivavapezit.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/81466587314.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/65428226886.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccaf6d4177---11350227486.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609c71be6c693---wunimowupojiderugobidema.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/nijupirasidasizo.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/59111202148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=hernia+epigastrica+en+ni%C3%B1os+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_off0000e0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 10944 bytes
SHA-256: 14fe7ee0835a4d93365c5f6fe9ad812d4d90bc2a8e8570d883923e18dbf80488
font_02_sfnt_off000111ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EE 18768 bytes
SHA-256: 09253ac3acfbddcb71c7ad24841534b202b34f1650584a5e1a6f4fcc1f9fc971