Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e0a419ecfb8ecb…

MALICIOUS

PDF

70.5 KB Created: 2021-09-01 04:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 188d2be96636d2a38170f6f474e52212 SHA-1: ca8f2d0246a90986fab2774cae4e4ccd23bc942f SHA-256: 92e0a419ecfb8ecb2e06bd6457b89829bc38b61a532f7d8e8c1016cbfa02acac
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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
  • 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
  • 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://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/odsmj66fig6ruamjvsgpem2rir/42374180712.pdf In PDF document text
    • http://deckdreams.com/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/womaxidozajum.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/b67dc85e638ca88720b6c97abc63db04/raninulelevovak.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/kuxonof.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/jb3kohsm1al171pmdam7mgikks/sapenawolew.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/7086869151.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/9779840046.pdfIn PDF document text
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/mexipuvanikozeguzulu.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/risajepufi.pdfIn PDF document text
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/83400320270.pdfIn PDF document text
    • https://cliniquemyo.com/userfiles/file/bebibigaxumalevelekuso.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/14478359778.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/77112543501.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/getefajevenizotarivef.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/pupejorupew.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/potugavorivago.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/lelurezujolubos.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/manuluzavixuf.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/17977309479.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/74516751847.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/rarunubidadel.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/30484802080.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/makiwuregavarasuvamowadu.pdfIn PDF document text
    • http://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/danasanazekotun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=what+is+undergraduate+meanPDF 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_off0000b4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BD 10620 bytes
SHA-256: da462c6e45efe9403f20780d65c756223bb12974c95fd4e0415ca13550440361
font_01_sfnt_off0000cca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA1 15224 bytes
SHA-256: 944ac2dc28956f940c46b15f59ba65673b0202db6530919349ddbd80aece509c
font_02_sfnt_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1