Malicious PDF — malware analysis report

Static analysis result for SHA-256 e008e1cca497a226…

MALICIOUS

PDF

82.2 KB Created: 2021-09-17 18:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9858b04d8c7dc1630debad75cebc14f0 SHA-1: 5afe30b63d1326eab4d80bcf3544abd6af08092d SHA-256: e008e1cca497a22615704dd3d7bc18f01b9da97f91b3a097d9d822160088aeca
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to potentially disposable domains, strongly suggests a phishing or malware distribution attempt. The document's structure and the high number of links are consistent with a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://dycelife.com/userfiles/file/xewumelaw.pdf In PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/7706452725.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/vosexaru.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/fesuko.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/lanibawosimavixebawavek.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/44295763578.pdfIn PDF document text
    • http://swhos.com/upload/files/vebikaxebomoxitupun.pdfIn PDF document text
    • http://chongros.com/userData/board/file/fimez.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/busarowawor.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/98279164514.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/rexapasetuwadalasufemur.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/roxugutekovagorewef.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/44097538591.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614127bf4f334---97053392076.pdfIn PDF document text
    • https://digireg.it/upload/sagefu.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/59942981481.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/82379413728.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210916023602.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/75416757908.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/7380997450.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/30743875024.pdfIn PDF document text
    • https://ntc-container.com/upload/files/74519096640.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/19385905415.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/rigelewuvamonarigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=recycle+bin+in+android+phonePDF link annotation
    • 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_off0000db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 17988 bytes
SHA-256: ae0d7e85f4416a89aa1d1e0af98c6a68212f4bfa24431df48e756f643bd594bb
font_02_sfnt_off000122b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B3 10644 bytes
SHA-256: e7c17b264e1a26b1a2ba0bce0b75f6335a8987b458760d8237fe068df756f042