Malicious PDF — malware analysis report

Static analysis result for SHA-256 212b274d6c1f08ad…

MALICIOUS

PDF

77.5 KB Created: 2021-09-07 18:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c3c0165fdc3965dd1a47d490986cb243 SHA-1: bb5e0c0fbc76f79e96b041a795ba6c7dc74a55f0 SHA-256: 212b274d6c1f08adac18a09b373d6a26ab62da30749620f4641a03d630c86d1d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack vector appears to be luring users via these links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=turner+syndrome+pdf PDF link annotation
    • http://blesk-stroy.ru/userfiles/files/vavoximidex.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3008fa0da40ce32e13528186540d59a3/81839165171.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/335u84gse2pd7trlaip1iglq0a/38336742811.pdfIn PDF document text
    • https://matratva.in/userfiles/file/12866711993.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/830dbc3944806ab55efebd5d1896dcf2/pixagalovebulifir.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/pixanigopin.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/15796355133.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1b8cdd0a1---74459097986.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/bujeg.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/54574522307.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/vetoxixejowamiben.pdfIn PDF document text
    • http://elskenecologie.nl/files/nigalisu.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/bujorinodixokelabaxuvuwuk.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/25227227295.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8342d3e95---59402627090.pdfIn PDF document text
    • https://coil.hk/upload/files/25240757505.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/35558856031.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16111d1303235e---46958213440.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/46783361315.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/34784328975.pdfIn PDF document text
    • http://abnicum.com/files/file/22670248796.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/4f799448f45d1ae49d524777ed3be4d0/pelubobaletutalar.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 17348 bytes
SHA-256: 289a1fff128ba25605a1cef498af3c6680a61cd86d32fede9166fbce0ae81525
font_02_sfnt_off00011150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11150 10440 bytes
SHA-256: ca80718a0e2fdc6b5a17e282526636d30a34c1da9cbcf8e36d4105ad6b2901b6

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