Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2223e2c1c4e2063…

MALICIOUS

PDF

75.8 KB Created: 2021-09-17 01:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06fba9f02992252b4f0b9475e7fba12e SHA-1: 9ebda03a17c3827c005480cf707765c10dbaa4e5 SHA-256: d2223e2c1c4e2063c7d9bf6482174fb5525bffa3236a8c20f620f6517b3d44cc
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://vedepcuaem.com/luutru/files/34433776970.pdf In PDF document text
    • https://groupekineconcept.com/userfiles/file/jedewazefibafitidudiva.pdfIn PDF document text
    • http://meditopthailand.com/file/80640757317.pdfIn PDF document text
    • http://strandedtattoo.net/file/susumezawupi.pdfIn PDF document text
    • http://homeopathyhk.com/files/75078779895.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e855e4bbe---26408354029.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/90082532074.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/gijuxudufitine.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/zaxusumi.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210912085242.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/70140034156.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/xugoke.pdfIn PDF document text
    • http://scarpatti.com/files/10932322861.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/sudejewoxixitefonitid.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/83071149189.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/170535234050.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ic2g30eu1qjagmvao18s0nk7ep/69411645667.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6p7u6s598h2j3psf6i8au6rs57/guredijagugaret.pdfIn PDF document text
    • http://brandorbit.in/userfiles/file/54294390829.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/85490582604.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210911_0F6C84500F7B294C.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ecd2e9bf5---86218151826.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/bifitabovokape.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/fikeramuwipinivaxomu.pdfIn PDF document text
    • https://marbletreasures.com/uploads/image/files/xumofumojonenanor.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/wifesizudixivobukijejaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=dark+souls+2+starting+classPDF 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_off0000c6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F7 10588 bytes
SHA-256: d98e4f53f3bbf15cbd3c9d72e88b45a10e22db863249928bab9253fd77e32271
font_01_sfnt_off0000df5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 16268 bytes
SHA-256: 3a830f5f62dc0518d5e243656f13c0ad4958fb35d88444efb9b08bf89561bcc3

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