Malicious PDF — malware analysis report

Static analysis result for SHA-256 8061eff2e7a8d89b…

MALICIOUS

PDF

92.9 KB Created: 2021-09-19 11:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e753caf11be16f36980659a0460c68d7 SHA-1: 304cc8cb2129f4eb716f23f29a9af7a39255e3ed SHA-256: 8061eff2e7a8d89b58319357e8ed465ccc594a90df3234e125abc69691677e1c
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm or phishing lure. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into clicking links that could lead to malware or unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=easeus+data+recovery+apk+mod PDF link annotation
    • http://www.dr.schure.net/ckfinder/userfiles/files/92236880081.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/5386606861.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/94029350938.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/worowelijixuvafeva.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/161426ba7adf04---48553028044.pdfIn PDF document text
    • http://arablift.net/userfiles/file/gaxotatuvudezekumiralev.pdfIn PDF document text
    • https://12waktu.com/contents/files/41342362252.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/lidowopanuxofonezuredote.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/fimuzemevodudenejitujepe.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/62510383466.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613022f91deaf---73746564095.pdfIn PDF document text
    • http://wawa757.com/uploads/files/bosiniken.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/1850724762.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/bitifupe.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/66489140856.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16140d9b411ec2---96709939410.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/dapivaminazufirog.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2aed33bfd601de675ee9faf1bf6eadd1/47023312557.pdfIn PDF document text
    • http://regmac.net/userfiles/files/29472078354.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/10230459611.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/xusifixid.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/b070dbacaea28f1d222c87e61090584c.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_off0001006d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006D 20252 bytes
SHA-256: 3158be20c462e9665ba7bd81e0d9937bcd6fa64695c6a3ff1a17b4b8584e68e3
font_01_sfnt_off00013505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13505 10788 bytes
SHA-256: eb2dde358b8f616ad3a3aadab97ffb48fcc7bf8d7df35b222a8cca75c9b786fe
font_02_sfnt_off00014dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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