Malicious PDF — malware analysis report

Static analysis result for SHA-256 04613101d24745d2…

MALICIOUS

PDF

83.6 KB Created: 2021-09-03 20:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 69830104624fa4c87bb5f172ce167af0 SHA-1: 8bd6cde1c7ec979bfc5c2cf87a3160373308e5d5 SHA-256: 04613101d24745d22b6d8c9c08e185c1319618b38b6f667cf9c847802572fddb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the overall heuristic profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://huntic.ru/uplcv?utm_term=concepto+de+percepci%C3%B3n+visual+pdf PDF link annotation
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f3d6d07f8---36531988664.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/7215d528893231472337131bfe5879a8/rugetejajuxafinulitiraza.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/20283756823.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/c1f3328ab625dcd081d42bf16b0dd83c/puluwoserukawesof.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc786dc08ba---gosujixujo.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/32149093610.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/menej4qictri59ure26rtarl9m/80859294576.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/b21d329a32f32785f9da1dc20188ac45/ruletorovitokadabedib.pdfIn PDF document text
    • http://akssert.com/userfiles/files/kepevititix.pdfIn PDF document text
    • https://elektrona.cz/files/file/kedutobiwegubosavarifa.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/pilawamewuxaxomulu.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/bekizimivobidigo.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/nujozodevugejidozekutiki.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/kawadibolerozomexe.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/913cf22832524f327b95b20efe68ec78/zerigafi.pdfIn PDF document text
    • http://e-hane.com/files/lidibopa.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/45040880835.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/65897648204.pdfIn PDF document text
    • https://shoreluxurylimos.com/userfiles/files/wetegube.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/xuwusegib.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/darisuriw.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b54bdfdcae5---siwimexaf.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077f3aa8199f---95806029198.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_off0000de69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 10948 bytes
SHA-256: a602ebe065c82dd0eb0207f7533bb43d8c3e42f0bd7dc1c4f9b882daeaaba998
font_01_sfnt_off0000f7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC2 19144 bytes
SHA-256: 8386331f864e6373486b63fe7ae7b0fd259dbde8ee638a02b8666174cafb69e0

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