Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45ae8c287740e8f…

MALICIOUS

PDF

67.7 KB Created: 2021-06-23 20:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fad99e5ff46a944fa541b7cd08012ba SHA-1: 62e3c935d79976d9401873c1d92235f93e8de0e2 SHA-256: e45ae8c287740e8f5d6e87086fd0d04cbc6fb01263ac91533439bc37262800c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites, likely for phishing or malware distribution. The document's content is obfuscated, but the presence of numerous external links and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/ulkkpl8vo88lucs8hm3ohppft7/zegemabojupidotut.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609378ca4fdaf---satelizawok.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/f5ea97f86bc227d0bcefe886c9a83fe8/nawotumavulegomejus.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/605801f20cea5cac6c88cad4fb2e9d44/89415889962.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160813a51a470d---20999818917.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/14b201d7497aa11e060dc4f22c91e8dd/vekanobosa.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d6acc4f25---3139102860.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f450f48e55---zilanujafezibajumise.pdf
    • http://baikalspring.ru/ckfinder/userfiles/files/jexetezila.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/kupl0i646duigagrsqda9bso01/15493099102.pdf
    • https://briljant-maleri.se/UserFiles/files/wisitowabimawagafupatul.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607abd423f52f---74748242131.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609ec6bad078b---majiwunonexavupolelutof.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e941ab4f99---28293009435.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=college+calculus+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea3.bin
64b4a76cf9e70cc4ee66bffa8ab633cb61f08302188b7f077ac01f49e6437269		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA3 5132 bytes
font_01_sfnt_off0000e034.bin
7eec983faa329b5fbd7f5d24b19d395590af493d6fde5a16cd3cedac147b0b9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE034 9944 bytes

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