Malicious PDF — malware analysis report

Static analysis result for SHA-256 376bb98296e5699f…

MALICIOUS

PDF

77.8 KB Created: 2021-09-22 10:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ed332e2fcad839acf146990b485f0ec SHA-1: 0dbdd505c13be464588a9bb43f1088852a69fe9c SHA-256: 376bb98296e5699f215003bcd597fb2443785b818ad9bd9a73e3911d760d038b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan variant. It contains numerous external URIs pointing to various domains, suggesting a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://infrive.ru/uplcv?utm_term=get+photos+from+android+to+iphone
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428c5dccdee---71077022847.pdf
    • https://mobilieroccasion.fr/uploads/file/vibewatulazaja.pdf
    • https://goldmenu.com/userfiles/file/wutipetivagividujifijuji.pdf
    • http://gps-tw.com/CKEdit/upload/files/25454196022.pdf
    • https://anna-bel.com/app/webroot/files/userfiles/files/90645648957.pdf
    • http://highspiritsmusic.com/ckfinder/userfiles/files/pemafegujiwojawulolinipa.pdf
    • http://bukharageorgia.com/sites/default/files/file/refotetasekakivuzabog.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614002faf2f55---32964851256.pdf
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/18040660287.pdf
    • http://bftt.marketsearching.com/upload/files/naxilesi.pdf
    • http://holidayservicemarsala.it/userfiles/files/wedutikugatojuvij.pdf
    • https://luckysurface.itweald.com/uploads/files/612f61a8e7a90.pdf
    • https://h1t-url12shio-turbo.com/contents/files/dumari.pdf
    • http://chiengthai.com/file_media/file_image/file/69605795290.pdf
    • https://powerliteaac.com/userfiles/file/nidaxixibapeku.pdf
    • http://aircond.md/upload_fck/file/subituvolelefoladafodop.pdf
    • http://www.pics4us.de/userfiles/file/44613249843.pdf
    • https://emailchopper.rockeit.com/userfiles/file/domatine.pdf
    • http://aromacosmetics.bg/assets/userfiles/file/66425476414.pdf
    • http://kssi.ir/public/userfiles/file/jinewuzupajudaweg.pdf
    • http://damnoen.com/ckfinder/pho/files/pamejedogopodoriwito.pdf
    • http://hsound.ro/images/custom/file/pipirixabolegi.pdf
    • https://czus-lukasa.sk/userfiles/file/dajegimupumek.pdf
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/xomum.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf3.bin
c6f31e21fecd39adc695b75cff62064fb716b92d9a5348b777b214c953ecb16f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF3 10756 bytes
font_01_sfnt_off0000e48d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 16792 bytes
font_02_sfnt_off0000fc9f.bin
4af47bd487d7641b8c6788481cbd8d831c9e434754a64869e7a42e171da6c302		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 17572 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.