Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f183aa45e283ff…

MALICIOUS

PDF

95.9 KB Created: 2021-08-16 19:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 51160c653f74538b1b2aa13da6bbef38 SHA-1: 9182ad3e94ebb2b85099cbbcbc4ab14779d6703a SHA-256: e2f183aa45e283ff6cfe190b1a78dd52f8ff0cf8da89f3c3c26bf6d34fc4e4f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that lead to compromised CMS upload storage and disposable hosting, likely to trick users into downloading further malware. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or credential harvesting attempt.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6ac9c203d969b7177a65358b04fc44d5/88360948972.pdf In PDF document text
    • http://bygreenpure.com/userfiles/file/50734382083.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/66347149609.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/gejedovesewuliju.pdfIn PDF document text
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/poxilomelidiki.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/28364212403.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/kufapuvonubonotikibabuza.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160872e29b9e0e---zejoborikesur.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/523bd536e478b866ce69ae75a8dd0b3e/jitowujazaganenezazugenib.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/mvt8roidq69hogp77me8n7e4l8/wipuveviwobagifelepevu.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/53281193545.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/kiritinu.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/xivafelojoniweravile.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ea724f1b8---68856871315.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/90773121190.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6767e00aa6---rutamujirexu.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/f4945b1c1f9a34d229f4256f049ea8d1/lozifidovinifibakawun.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/gowimexopirumi.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/bugivuwolusubolamajuzugux.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/kixepenarasajisarupo.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/ffb2c2ba8f48fab11bd5c25b8339d8e1/getogu.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b785f7c8c6a---24275094192.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/235beb79a7703b5d032ee0ae8f840980/94956269230.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/jinilisagot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=kingsman+the+secret+service+in+hindi+720p+download+filmymeetPDF 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_off00010fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000127f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F4 11616 bytes
SHA-256: fb3b36e061d2f1b959f2d25b3606d76403e49c5d2c027a65dcb88ad85dbeb5b1
font_02_sfnt_off00014349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14349 17368 bytes
SHA-256: 6bbe539bdfd86445d454b0f6e4ca77b81c4c7dec908573595282abf3bb630678