Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0d0ff0a2be1445…

MALICIOUS

PDF

86.5 KB Created: 2021-09-12 14:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a033ae09d9272274257bdbcfa3ebf933 SHA-1: 06bc70a860ec96b78dff6d79e5c708da43943835 SHA-256: 2e0d0ff0a2be1445d30aac1ea423f028dbec8b0eafe2f95e8ecde2fe3a01959f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

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://synerhu.ru/uplcv?utm_term=stremio+for+android+tv+box PDF link annotation
    • http://tbeaindia.com/userfiles/file/8489458254.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/48238701030.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210906133117_w5gsf9.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/xupaxodudinesulolabod.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/bf6e247caed3c97b66170f51cd1611f7/vigoga.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/60546367404.pdfIn PDF document text
    • http://proxima-online.it/public/file/57143197681.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/96388761165.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/6846337204.pdfIn PDF document text
    • http://kelsenator.com/userimages/gagudawomi.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/57883442393.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/40997348364.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/26541131956.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/fitogipis.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/nojid.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/66166259195.pdfIn PDF document text
    • https://songhongresort.com/img/files/5612846529.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/95776834326.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/14824770814.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/jafazemomosawukejajevep.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/wuwuvanuzekufogitunu.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/5b2aa1d3f3b63c4da5cc9d09282a3920/punuwupexixis.pdfIn PDF document text
    • http://splogservice.ru/content/files/70370061779.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613a06416a456---23904378474.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/80286419361.pdfIn PDF document text
    • 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_off0000ea36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA36 19080 bytes
SHA-256: 55ff7592902c9b9760ddf940ee9defeab922f91cae1c0dc82f2179284de9c994
font_01_sfnt_off00011bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D2 10684 bytes
SHA-256: fd2efa77a74cdbaec98b83a514cf0bc701eba0928a8592d3effb2df465ad7ba9