Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be4a0567dda703f…

MALICIOUS

PDF

91.6 KB Created: 2021-06-30 07:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8bb29c52b0b8850b3d8d5c5ce8f06c64 SHA-1: 90111f697b788298df124ffbd14c15e2dd9e83d7 SHA-256: 4be4a0567dda703f483ab01fe200609025d509acc34130f5391d163c4036d92c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to host malicious files. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were explicitly extracted, the overall structure and URL findings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://wastran.ru/uplcv?utm_term=word+to+pdf+free+no+sign+up PDF link annotation
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/5f7571fc915a623cd6f6caaf91adae94/mevudetafekolaraxufugeg.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5800115cca---75050235678.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8a735685e---1878739211.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/gapuvoxevifafupeto.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c8b36e71a---ribiduse.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/genusudolexozafogawelas.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/malinufudo.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e14525bd9eb90bc8d860b505fe6859df/59896523677.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/cabb278ceb18bdb5436af26d73aee313/72388098082.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16079221747dbd---97530774362.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d352d9190---jagekoxizefulumefowiboje.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c7d78246e---58133887970.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/aj5d8rfl9fu5o25hgdp1oa39mq/66851372200.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/81675176678.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/42irhfgipcccj2hg0f1qqsq3f7/nitigef.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/samekomarugojawevexexa.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b579431b05---tidowukivilutes.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/3224771809.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/83927155827.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/37513330120.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021062802585576406.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/16295832068.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a7e1a165887d9237faedce865599713f/wisagob.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 17652 bytes
SHA-256: 6eaf72202efd6c11c5c75604607e2bdbeb1d5605867302e5c1ce0ec52cf92f13
font_02_sfnt_off00013357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13357 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_03_sfnt_off000148d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148D7 10556 bytes
SHA-256: 1010983860377c56e6d578b93896ad4ee8e35d5cfdf984e3c643dd6dd38435d6

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