Malicious PDF — malware analysis report

Static analysis result for SHA-256 95417bc1f33dd226…

MALICIOUS

PDF

67.5 KB Created: 2021-09-28 05:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a883f7c78bb64c5a66ab598d19e0f7e SHA-1: e97162f9dc64853f26001f811abf435de0941f02 SHA-256: 95417bc1f33dd2267adfde85df1fb8c0c95c6e08e7af85ef1db9874ec5207073
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised or disposable hosting. The document body is heavily obfuscated, preventing analysis of its direct content, but the presence of numerous external links suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://albino-pitti.com/pub_img/file/57708630445.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1614bdcbe4ce97---seketidiseselelowagujik.pdf
    • https://hazeloyun.com/calisma2/files/uploads/gatakilapejirobizumi.pdf
    • http://www.astmalek.cz/obrazky/file/6986063047.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328d1e4950b---kazanupebuniwisarotujotaz.pdf
    • http://dailymaytrogiang.com/userfiles/files/wemikepopum.pdf
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/85755500862.pdf
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/54188434087.pdf
    • http://citygclub.com/ckupload/files/41546660125.pdf
    • https://giasidaily.com/uploads/userfiles/file/napamiwulipu.pdf
    • https://zoomkish.com/basefile/zoomkishcom/files/tubalogozivixenarow.pdf
    • http://j-line.ca/fck_upload/file/xijugutojenuge.pdf
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/28262672486.pdf
    • http://brlairport.com/images/file/75850083066.pdf
    • https://franchisevisions.com/broker-site/files/files/jimobotolotulavaxetonu.pdf
    • http://m-camper.ru/ckfinder/userfiles/files/timoramaxoditejofapuk.pdf
    • http://kalkulacka-hypo.cz/userfiles/files/fufukevevom.pdf
    • http://dpkwi.org/userfiles/files/1929499830.pdf
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/pulomusu.pdf
    • http://luminex.pl/upload/file/xiwemejudonu.pdf
    • http://studiotecnicopinto.it/userfiles/files/16572930458.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/jabubelanup.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=top+part+of+stomach+hurts
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ace5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACE5 16792 bytes
font_01_sfnt_off0000c4fc.bin
e5e231378519c01e1cb9a02602a55add4c6f3ec4bd0facc4e54b1c357ce45060		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FC 10436 bytes
font_02_sfnt_off0000dcb2.bin
030dcf6ada45ff46c477706c893a6c64901e3909bfbd24b0439c358e5fb693b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 14380 bytes

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