Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98c99f7eef2b2c0…

MALICIOUS

PDF

81.4 KB Created: 2021-09-04 08:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e11c5a2e69e490cf2edc899f96aeaa3e SHA-1: db4041d9df67c19a5901783413bbc236d4d3fdf4 SHA-256: a98c99f7eef2b2c0db65fb8f09bd090b792867c0d9fc69e62e49a1776ea61dda
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into decrypting a password-protected archive, a common tactic for evading gateway security. The numerous extracted URLs, many pointing to compromised CMS uploads or disposable hosting, further support its role as a downloader or part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://watdoenwevandaag.nl/upload/32558605732.pdf In PDF document text
    • https://oddluzanie.net/userfiles/file/xunezifume.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/43577527399.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/5344eabdfb219cdd47fb87cab414d994/domufabewaxaguvewi.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/63822929266.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/29578920026.pdfIn PDF document text
    • http://bdn10.cz/files/file/77107495543.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/eea5ac07fb3a07baec566d73efb270a1/semavozozabilone.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/bejukedosomibodujer.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773972738be---mevefelefavimumugujarawu.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/jl0qn5fodse7li1e5dfivno5fv/40039336269.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/wemozexomatafov.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/e1c9323f81e9fe6df965bf26b92525bd/daxatider.pdfIn PDF document text
    • http://juentai.com/userfiles/files/81313523435.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/aidao6rmfgdlccb7o1f5u7pfqa/46038537983.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e1d4e8639---pelodekojonakigasapobofi.pdfIn PDF document text
    • https://keluargamimpi.com/contents//files/togomuritogikawixelafuto.pdfIn PDF document text
    • http://moristas.com/userfiles/files/13904197394.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/pebukin.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a208dc45e---75975886903.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c69c2a572---3641350948.pdfIn PDF document text
    • https://alpinashop.rudy-ra.com/files/gitubifixibitogigevose.pdfIn PDF document text
    • https://o-dance.com/upload/files/33022891275.pdfIn PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/52078085276.pdfIn PDF document text
    • https://digireg.es/upload/10033766990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=extraire+page+pdf+prot%C3%A9g%C3%A9PDF 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_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 10592 bytes
SHA-256: 24e424c1c6a9df9e26d3237eb7b85d79d3fccd3f751d6f66fc476e150e696ed1
font_01_sfnt_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 18444 bytes
SHA-256: 71efe28c138337190629c6d7de43cb908eb8f61caa867e4a96bf271eaab8734e
font_02_sfnt_off00011e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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