Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09b2ec9ee314a1f…

MALICIOUS

PDF

77.9 KB Created: 2021-09-01 14:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 7fee9304874255d5fc7fbee26155f4d1 SHA-1: aa33c5dba6c32b8858bb2e50e0d8be1c75cbfb5d SHA-256: e09b2ec9ee314a1f5d60de0c2c52e018199779e25c68d201cbb73071f23a0114
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious destinations. The primary attack pattern observed is the use of a link farm to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://allytemp.ru/uplcv?utm_term=painted+hills+visitor+center PDF link annotation
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b30d89ea3ac---wasofopi.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/cf9144ebc2d8b1d9effc0631f1d54fd7/vigasasirof.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/waximujerijisoxegotala.pdfIn PDF document text
    • https://advik.net/userfiles/file/25859632808.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/81395797452.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/nesavozuremibefilez.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff0c67a258---21282637088.pdfIn PDF document text
    • http://amdind.com/userfiles/file/vageja.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c3ae45aaf---84980228031.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/gubenevitedozud.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad02cfb882b---64336475153.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/73483620995.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c048eba69---56900090487.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/botebaxitekanodowusafexe.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/34oltqsja7hgu518aglkueg9c3/moxozimuvixefazukenusunij.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/padivemuverusikigufomut.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3320cea1e---muzuvapixetugejobagapex.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/68528259272.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/jejelaxidagafagerolusapi.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/72537486457.pdfIn PDF document text
    • http://lowry-averyreunion.com/clients/c/c0/c0e4e7922159a76f956c19110b7bfeb7/File/fojolapuke.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/fowarakenibivirawipupo.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/gobikevawuzemo.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/18950388096.pdfIn PDF document text
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/51930687308.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_off0000cd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4A 17112 bytes
SHA-256: aba9df279c45c88653ee4bd4287a15b4bd0e168c500631a02105d50cd5e2a751
font_01_sfnt_off0000f957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF957 10536 bytes
SHA-256: 03afd6bdd4769574b7b1ba4e319440c76e2b5fb3b2880935447dfad42bceb7bb
font_02_sfnt_off00011151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11151 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1