Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e94781d7ed3f20…

MALICIOUS

PDF

77.6 KB Created: 2021-09-27 23:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ba5cb5fa611a6a690894e2188d331f3b SHA-1: 0a20657cb36638a29f37d5b9c12968b6ee5463c6 SHA-256: 00e94781d7ed3f201f24764e34bd846b295ad22d71d1fda1a88b543416733aae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of external URIs like https://smidgel.ru/uplcv?utm_term=gt+n7000+stock+rom further supports this, likely serving as a lure or part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6760

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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=gt+n7000+stock+rom PDF link annotation
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613754772637a---29562915268.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/1350056404.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/f734b66c5b78d153b53df62f295c50e9/zatimufimobumim.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109200718022869.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/nonekomakuzizojejad.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210906142459.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/larezeragetolugopixon.pdfIn PDF document text
    • http://megamento.com/_UploadFile/Images/file/pojego.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/32164810663.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/64167594619.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/42315293514.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/tezalakomibetasogimufo.pdfIn PDF document text
    • https://caraudioshop.ro/mm/file/80188258512.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/parowosezobovurajofodujo.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/7ft8u3k85o2f1auhk5f2jqifk4/82110123401.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/sedafazojemimozuresivi.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/donuwasaxelo.pdfIn PDF document text
    • http://jr.ac.th/ckfinder/userfiles/files/rizafojemotix.pdfIn PDF document text
    • https://rtaadmin.mrv-educationservices.com/content_file/files/kunubukazevi.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161321e7bf1b19---230428920.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/75257427966.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/tijebogano.pdfIn 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_off0000cfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F0 10260 bytes
SHA-256: 7718033aee35286a35635b4ce42e3953caed69cc209404ea7d2a4c4709d23724
font_02_sfnt_off0000ff19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF19 20740 bytes
SHA-256: cc8e9e03e4490667331422aa86796811a97813d833f8eebdf398497e86ad5cae

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