Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42924e0f26dbe0b…

MALICIOUS

PDF

79.8 KB Created: 2021-09-17 14:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0d089d8648845f181fbc5cd1c36b06ce SHA-1: 4cd7f7e2ead5da602ccb73dfc0f33084587e837a SHA-256: e42924e0f26dbe0bcf2c5e23bb9d39fc19ede7fb71aaf3cfa164fd395064e091
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic of encrypting payloads to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=how+to+change+pin+to+pattern+in+android+phone PDF link annotation
    • http://studioaeditecne.it/userfiles/file/6894562344.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/6950476753.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/vajudibi.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/47481473955.pdfIn PDF document text
    • http://ailizia.com/userfiles/kogojadivafatup.pdfIn PDF document text
    • http://capital96.com/userfiles/file/nulatefofapute.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31905162227.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/motepogugugotekedos.pdfIn PDF document text
    • http://blueyee.com/upload/file/041204109639.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/wikotomatovosubiruk.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/popowopunenum.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/roxuxe.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/75061526562.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/zufitozijapavat.pdfIn PDF document text
    • http://matrix-corporation.com/upfiles/editor/files/xitafegafukug.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/fakokubumifubolawepejodu.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/lafozof.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/35439064602.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/kuludekomarage.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/faxot.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_off0000d480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 10656 bytes
SHA-256: d77d4f1821c03a8c4bd623fcd4d90071809138463c9fdfe52cca30085be548a9
font_02_sfnt_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 17552 bytes
SHA-256: 0a17778e4c2ef3142b15fcaa7ae68c2e9d69e03c4ac4e4f9c7d24eed3f4dbe6f

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