Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa299a372b1f0dd1…

MALICIOUS

PDF

82.7 KB Created: 2021-09-09 01:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5a6cb7f003fa6d793f4da03d934cc46e SHA-1: a7a0c4f10d6c07b827d78faadb0ca7ec0a294f78 SHA-256: aa299a372b1f0dd1da3e320984ea9a72244c591b0a6780909fb6fd0a8fe720d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to various websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting an attempt to obscure the final malicious destination. The primary purpose appears to be redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://villatoscana-pi.it/userfiles/file/xamepupujonezu.pdf In PDF document text
    • https://albizy.com/ckfinder/userfiles/files/wododekojivikuromasuzuj.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/solujujasuluvu.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb6a01d028---kilobumujutebagakekekokep.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/faaupkd6c7feqo1drpjeuij655/jodububaruwamasuwidu.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/gelubedisabogaripezutob.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ano90s0f9qt194gmq3qq4f1uht/73124799507.pdfIn PDF document text
    • https://kstraders.com/userfiles/file/wamap.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090413154879.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/ribujukusebotevoneloso.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/37763426414.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/98621880001.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/87450804659.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/dimuzoviw.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/bopunitinutatiwatewirafox.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/34925242458.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/bekogow.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/kewofetigedenobe.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7aa0a94fd---sovodefagafatajelalixafa.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/remimog.pdfIn PDF document text
    • https://12tiga.com/contents/files/19124016669.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/p83ojn7tv3970cphq5qprh2uuu/fuzokiwujop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+i+cast+my+tablet+to+my+tvPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 10724 bytes
SHA-256: 3d2307f9f6d21875edce34b42b6cf428caf75e64cc9a35e76a06610dfe8aab83
font_02_sfnt_off00010e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E54 18188 bytes
SHA-256: fea96fb18ce9f284195d0d2b871415c336c683a103f0db4910bc149de296c7ee

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