Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d797862eaa0c9b…

MALICIOUS

PDF

83.9 KB Created: 2021-09-04 05:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2231dd40054df5f3df0576c7c339199d SHA-1: f03456c808dd5fe4d1d23fc590d6f6466fd83cb2 SHA-256: e0d797862eaa0c9b2532b39394652abbf098df219d85a8e19331261acf040178
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to various potentially compromised websites. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings indicates a pattern of using disposable or compromised hosting for malicious links. No scripts were extracted, but the overall structure suggests an attempt to deliver users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://euro520.net/userfiles/file/1622790519556430426.pdf In PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/toxibilolonijobow.pdfIn PDF document text
    • https://orrizon.ru/images/file/68264181611.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739edaf0c5a---xijibamoruladoji.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbb92f0309---44230006007.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/50733149069.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/jaratoporamok.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781cb9c2390---55828431421.pdfIn PDF document text
    • http://yoron.net/up/files/benunibepimigukiruji.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161191c634e180---48975665882.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/pajamurabevotur.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/fapopifowakakanufusopeluj.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/movebe.pdfIn PDF document text
    • http://zae.me/datafiles/file/bubosizewuvuv.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/dc915b63c70cea0e55d3ae70aae336af/43827698787.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/0f45fb4ac1cab44745aec19f47fd81f0/99257118187.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8e501965b---xikikikoditobes.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081efb6b5aec---gumisonipanis.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/49389863292.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/27741481018.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/dinanakedovabifev.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/velinerivedodepeje.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/fopopatudarimuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=digoxina+dosis+pediatrica+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

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_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 18488 bytes
SHA-256: fa8251c34b020165218c8f80a5c58df3444ab45fcaad27dc8e9565c32b5c4910
font_01_sfnt_off000110b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CA 10852 bytes
SHA-256: 2a2790f0eeea57afe4a0e807925562cd621515eacd7ea04b6dc982b5353762c0

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