Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da2cf889c58bd04…

MALICIOUS

PDF

74.0 KB Created: 2021-09-16 04:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 15777cec4bbdbcdd0e989aef6d2ed495 SHA-1: c41dff9cd4191d04c6cf31373b1cc7b1896d0132 SHA-256: 9da2cf889c58bd04f531d8c3960a0810eea838c01630b5712655bc2ab8b5f33d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or callback scam. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains indicators consistent with callback phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://cructi.ru/uplcv?utm_term=last+day+on+earth+mod+android+1 PDF link annotation
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/8045149032.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/gipulafuxube.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/fotuluxevowitalugolanu.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/48541276604.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/lopiwilinigadi.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/topomorovuvomupolukufi.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/9406a0136c921207be4254e246c8f8b4/24731640365.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/64938535533.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/emka3sl910fnj5qi4h13sptqfg/10638133341.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/41446561025.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/e3beafd8cae39ac126d57799bbc05350/1685219924.pdfIn PDF document text
    • http://peter-crooks.com/userfiles/file/25282719718.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/bagabevepugojepazus.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/31023200076.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/derudekemureb.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/45121416364.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de8162f66a---124117951.pdfIn PDF document text
    • http://saint-party.com/media/file/senonokej.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45032414358.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/dolizuvatik.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/58600593221.pdfIn PDF document text
    • https://alohasafaris.com/files/bakavalixofoguzedaj.pdfIn PDF document text
    • http://ore-processing.ru/d/files/79288745257.pdfIn PDF document text
    • http://tfforming.ru/d/files/kapameruvugobojak.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_off0000c181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC181 10592 bytes
SHA-256: f1acdc89a437a9bcfae20dcfbb291c6a61d9193f4ccb9a108404d48fee8a2c1a
font_01_sfnt_off0000d98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 15928 bytes
SHA-256: 37df69c474f8caadbd56dddf5584f2c4336f986565f879ad88f5fe6427ec250b

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