Malicious PDF — malware analysis report

Static analysis result for SHA-256 985286b94cb7659e…

MALICIOUS

PDF

89.0 KB Created: 2021-09-09 00:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f6786736be9f6cd6fd972819897adb82 SHA-1: d1eb3fcd4f49f4ae555340e57f47bc32ae5df1a2 SHA-256: 985286b94cb7659ee0cdf4f7e783db4830b9f401c90ae2f4eeab2a22007bae01
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and a link farm heuristic indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://pixomot.ru/uplcv?utm_term=good+reader+android+app PDF link annotation
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/kozadupoda.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/dilosenukujo.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/20955084215.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/68681084742.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/68124450845.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130912171278---22836674352.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/pomuwojukeweduvurag.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a2780f9bb---60270200869.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/6066156126.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/82974678599.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613801129b2f8---magogi.pdfIn PDF document text
    • https://voxel-avocats.fr/uploads/file/In PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/gemedodogofetewexet.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/87697616259.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fofigawoxukifaz.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161361cb64317f---69349953591.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jv9ua6mjv6t8at9iafbpfve545/22942505059.pdfIn PDF document text
    • https://arendic.cl/files/larupobavewadibef.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/91733918083.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/mebotizajeguzezabezeduja.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210901145016.pdfIn PDF document text
    • http://konberdbio.com/upload/files/gefejitewamowama.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/26102505054.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/38374206752.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_off0000f92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 17808 bytes
SHA-256: b656bf509e7b300c8df04a0cab20491fdadbaf3f5f0187bc9ba8b5de57cf957a
font_01_sfnt_off00012772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12772 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F89 10112 bytes
SHA-256: de543194d16eb8c590d63758f3c143e5b2e7f8b2c0dcb9bdb872e88948d5f82d

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