Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f74ef51344fa7d…

MALICIOUS

PDF

82.0 KB Created: 2021-09-19 17:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 48e341bbbbc33bacb01d03f1badcac5c SHA-1: d571f4103a2bf1555fbe0837128ccef7f43bba71 SHA-256: c6f74ef51344fa7d9d9efbbcd0658181655a48fc343eb381a74c90646c680748
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=zolaxis+patcher+emote PDF link annotation
    • http://luluscafeonline.com/uploads/files/38699537047.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/jonazuzewujazawekume.pdfIn PDF document text
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/37320696211.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/volunow.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/rdasm2kg5lnoou2r9r2jgh1g3g/30041203371.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/gumuwoditaxu.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/50540662179.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/35822342928.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/1724016978.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/1732734735.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/39363345992.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/papatunetojoxotinesulusa.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/lufetewamitotoz.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/rosufufunewufo.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/69559312582.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/90607685033.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210907190702_1364361794.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-7/20210907112330914486.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/tilonelemuboviva.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/34485524471.pdfIn PDF document text
    • http://getdol.com/page_data/file/boresopolazel.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/wotoxuxike.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/91994239407.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_off0000dab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB8 17904 bytes
SHA-256: e99fb7dc12a0cf51b30db4477a011370cf556ac385bdc6834b726730f1f3d781
font_01_sfnt_off000109c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DC 10600 bytes
SHA-256: 442d4f7c3eb5940db64df65af6ee7f827d46846dd4e9eb2c8ba950acb035605d

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