Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2dd552ee273793…

MALICIOUS

PDF

72.1 KB Created: 2021-09-02 05:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8910791df12c71bbfbba4affbc3dc4cd SHA-1: d036765de2d1cf6cdf9f2da2ec247c52aa0d1928 SHA-256: fe2dd552ee273793653d5899cc623d2527e802d001ccc7d4265fe889dfeebfd6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of these links indicates an attempt to redirect users to malicious content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=haydn+richards+junior+english+book+3+with+answers PDF link annotation
    • https://magicdiscoradio.hu/userfiles/file/90056511400.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/lekubewosulerafefise.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/panixefatapijuwetikunifef.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fcf950fc9---wuxaxiwitavadudokofez.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/35710353234.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/84415010260.pdfIn PDF document text
    • http://tai-group.com/upload/files/mowuvelijiwuposi.pdfIn PDF document text
    • https://ismart99.net/upload/files/16344557875.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5af282c0a2---kufiroxirilotadasabufi.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/124b74748032fb8d7b2b4ab8690c0c43/bunuwa.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a710dca224d---wowofakizelufibo.pdfIn PDF document text
    • https://egf.tw/test2/images/file/42239881473.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ff14b1aeaf39bd2223664f0e04ff55c0/48892351276.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/49807177672.pdfIn PDF document text
    • http://atomleasing.ru/media/File/vidugo.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092c91842523---tetosivujeledobovigu.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/2184050777.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/20a91df1451743ba68c9cf80b0da68ff/bojive.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/24058644632.pdfIn PDF document text
    • https://capecoralliving.com/media/file/nosirirozi.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ca4111397---3866725022.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef60c7595f---tafizumizakinozo.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/vitapeniniwam.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/rakenogoxorogopim.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/lonetajedubopuxopekezu.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://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_off0000b6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0E 11472 bytes
SHA-256: d93625fda84d2ea6bd213980bc452dee385c6761ac174a8e2499f359ce099b5e
font_02_sfnt_off0000e9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EC 15968 bytes
SHA-256: bb7f5aa2d5366fe3d4e623236dff9ce914ec804cc10a39004442eeae7dcc6014

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