Malicious PDF — malware analysis report

Static analysis result for SHA-256 1333cbdee9cfdaf0…

MALICIOUS

PDF

77.6 KB Created: 2021-09-01 02:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bb244ae892d68190dbaa0ee6b1f81f2c SHA-1: 0acc297a5cc918b6a8e9c399ffe858ed990aa390 SHA-256: 1333cbdee9cfdaf0a6d7969224e5c4ab427addcd68dcc4ad55e8e42ebe838688
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://palakkadtourism.in/ckfinder/userfiles/files/13799576440.pdf In PDF document text
    • https://pharma-tools.eu/galeria/file/jedekozolikojexitabegi.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/14143938232.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/80051755034.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a938ca3f314---58365810551.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dc433b0e561---55855948850.pdfIn PDF document text
    • https://makenie.com/upload/files/35234583844.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/8d7e7e387cbec46800101c7ce3e8b826/61790050900.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/1296755794.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/57026916821.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc03c18007f---xisexemilesi.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/80291204962.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/77660546825.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/29110892482.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/67778861760.pdfIn PDF document text
    • http://hongdacable.com/d/files/wizulobefedigudokatumete.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/b6faa679d5de8ac23da8e2cae68fa2fc/49630445480.pdfIn PDF document text
    • http://bangkoksolarpower.com/syner_upload/images/files/fimumikiladimobepu.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/rudewuragujo.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/vaxufadatiledezoragale.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/supagemakofodomubawidulo.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mexaxodab.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f417c565c---30184143844.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=obstructed+tear+ductPDF 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_off0000ccdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDD 10268 bytes
SHA-256: e6d41700e420c4c7e654e4a80bad0d91bc11a05198b9371cb82cb98ffe391bcb
font_01_sfnt_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 16504 bytes
SHA-256: c3e40f4a70c1cefcf009d0436c0d4ebb942a5b903bf4c70ecadfb1c6eaff77b3

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