Malicious PDF — malware analysis report

Static analysis result for SHA-256 25514310079a689d…

MALICIOUS

PDF

82.3 KB Created: 2021-09-18 21:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e6f93182e3f46520d55eeaad334e0625 SHA-1: 788835f4babb177a004e2ddaf8a1c00403e74e24 SHA-256: 25514310079a689d810f47014fcccdce172c8bccb10266537d5f2693bb613219
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially malicious content, including compromised CMS uploads and disposable hosting. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://philabc.ru/uplcv?utm_term=increase+rom+in+android PDF link annotation
    • http://livestocktool.com/d/files/17897823905.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/68403514677.pdfIn PDF document text
    • https://panoramabyty.cz/content/14442699519.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/34942735388.pdfIn PDF document text
    • http://trieuduong.com/images/Download/59197644093.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/c88jc8hfasaovvj2s3ktccupe7/78382844494.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/bb24a6cc644c7f789a6cedc513d2ac6e/87345073661.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/poxotozaguluxoranedolu.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/gokedodetitajubarezi.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/morojoselir.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/zewakuziz.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43005119280.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/84221122245.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141848f12616---34213908080.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/xisoxodofez.pdfIn PDF document text
    • https://fivetc.net/uploads/files/gibupuxa.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202191819316547.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/sevilezilagesanewiweroxa.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/84628943102.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/modudetiriravoruzugedajar.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/38287249682.pdfIn PDF document text
    • http://theponghop.com/upload/files/balunimemulu.pdfIn PDF document text
    • http://anpo.vn/upload/files/89570766090.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/tevonidinomatov.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_off0000dc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2B 10336 bytes
SHA-256: 0de954e43bf9e91149273b07b479eb636bba8598524fb7ff71b4543ab5ab13bf
font_01_sfnt_off0000f36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 18948 bytes
SHA-256: f0d2afb2872d69eb5faf692d3596f6e6cfb3695225719639ff034cef3c436a25
font_02_sfnt_off0001240d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1