Malicious PDF — malware analysis report

Static analysis result for SHA-256 74497ccece4861b5…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 22:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dfb6fa5894479b09f90fba2941583474 SHA-1: 4fb4c6e0b4010cbbbf5d78a11c2688ade59a9484 SHA-256: 74497ccece4861b50345eb7da6f5b8c13f5217eb87a5935f86da25d916199d84
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URIs, including one that appears to be a redirector with a search term, suggesting a phishing or content-lure attempt. The PDF structure and embedded links indicate it's designed to drive traffic to potentially malicious websites.

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://smidgel.ru/uplcv?utm_term=anekudu+telugu+full+movie+hd+1080p+download PDF link annotation
    • https://lixtech.com.tw/ckfinder/ckfiles/files/xosamofujisulakonenupi.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45392633894.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/zomolifoxedobob.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/9131173639.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/minero.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/fujurinuxofipezaroxut.pdfIn PDF document text
    • https://nepalonlineexam.tisaracademy.com/userfiles/files/lebewarufimaxisanezomafo.pdfIn PDF document text
    • http://atomleasing.ru/media/File/labexodosonam.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/bexujitedug.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/27686452761.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/79377888863.pdfIn PDF document text
    • http://csp.hu/editor_up/savamaxosuwefalanunutuk.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/98887589158.pdfIn PDF document text
    • https://curvy.tw/upload/files/15381752780.pdfIn PDF document text
    • https://olterus.com/contents/files/fuzuvatugaf.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/14827381254.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/xaxeregidazarulate.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/xubofedaligegatata.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/80859951990.pdfIn PDF document text
    • http://totoumi.jp/upload/file/77972040138.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/visipozosasurezazunoz.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/63748522268.pdfIn PDF document text
    • http://freewest.at/disivepirulakevefox.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_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 11384 bytes
SHA-256: e2b792b8cbe6bcf962c25455bc474ad44ebab52f737ec6365cd6d1f83ecb10f2
font_01_sfnt_off0000f435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C47 17544 bytes
SHA-256: ee870b0abb113b4eb444196062f884a5439c636b72fb80b839592901b94b5a69

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