Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ed65911abe3723…

MALICIOUS

PDF

87.6 KB Created: 2021-07-17 23:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 272f57864657086abd15b7b582d335ca SHA-1: ec71808960d7f304536b1a71a273642e10eb5566 SHA-256: 00ed65911abe37237a3cd41c7a122dcdf367631989e191c2e741a7491f2e702f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to other PDF files hosted on compromised websites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple unknown PDF URLs suggests a broad distribution or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/b5f5d3123aecc40e92ba5b32f9482694/biwawulufoxidarepinav.pdf In PDF document text
    • https://annjulieskarpmo.com/userfiles/file/7149740485.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/35696095676.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/24339664508.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f1ef5a103779e740d82b610b85361b4/vogonaxozavakozusoduzu.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/ragapogilemoxegu.pdfIn PDF document text
    • https://okna-stv.ru/userfiles/files/saseginoba.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/kanawuselomuxaxazoritet.pdfIn PDF document text
    • http://cooleywestbrook.com/clients/865832/File/30155508419.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/sur88lafv1s3vpfi0nhg87r3b1/96847609111.pdfIn PDF document text
    • https://jin-ji.com/upload/files/xeliluzinirorosadetagis.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/46093121870.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d2ed0a285---57418216102.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/81956632465.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f4cc808c0.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/xiwunezapajajoji.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/esg8melgfmrivad757u8q5av94/73617129044.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/30078210492.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/juwilitukaremirajero.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/28527034207.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/jagorajo.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/643ebe98161e19e15a4fb6161e133e41/44432417826.pdfIn PDF document text
    • https://ewt.cz/res/file/darotemirilomugubiv.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/boxoxobolufebowefazoxexa.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7d96a1977---13374463862.pdfIn PDF document text
    • https://tanasiri.com/piceditor/file/nevabusubomobaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=define+melody+in+musicPDF 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_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 10492 bytes
SHA-256: d65ee6cb63cd001d3dd7d3e777f3d2a9d435881be000c4e0e02e3742a03c2ebf
font_01_sfnt_off00010ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE8 16868 bytes
SHA-256: 9e5369ddc5fa7acafc4ac621c075fed29c2bada0c1144d2345431971078ccd8f
font_02_sfnt_off000138fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1