Malicious PDF — malware analysis report

Static analysis result for SHA-256 8035d3000be143f1…

MALICIOUS

PDF

71.7 KB Created: 2021-09-27 16:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 734a5b13a9a8cfaa07e9616cd0e1a429 SHA-1: 82ae99a4e71fc494bd0a5b3c0438b85c6990a858 SHA-256: 8035d3000be143f104b4d8f97dd54c2e6b59ed814bd71e4cc5388db3b1c4e46b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous external URIs pointing to disposable hosting, suggesting a link farm or phishing attempt. The presence of embedded URLs indicates an attempt to redirect the user to potentially harmful external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://drafthe.ru/uplcv?utm_term=the+experiments+with+truth+mahatma+gandhi+pdf PDF link annotation
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60411505753.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/napigujoxekufe.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/55333018014.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/wakukozizukezapu.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109200346381832.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/28055991343.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/bevinero.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/89836906506.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/52952013437.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/tirusakoxofarefarugeb.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/janoluwizapesami.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/50610542506.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210913_030317.pdfIn PDF document text
    • https://orrizon.ru/images/file/sawudilaz.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/19379821134.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/69072949730.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331944882d0---zezonupatuwapasepuwagis.pdfIn PDF document text
    • http://meteoratourismactivities.com/files/files/dobebivino.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210901_119D5AD87F834018.pdfIn PDF document text
    • https://wlweb.co/sites/default/userfiles/file/melukulo.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/34506568116.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_off0000b2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A5 11028 bytes
SHA-256: 521cefde5248b61d7773cf5d9fc13f3a540da85342bf592c34671d0bb747fc5e
font_01_sfnt_off0000cc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE413 17464 bytes
SHA-256: f56475117eefe0d8d5594701b3a19d832f1c5368aec0694282c14d668723adb2

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