Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0119163cc8efae…

MALICIOUS

PDF

124.7 KB Created: 2021-09-15 19:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 50e8f81f4c1a0c48fc302cfa799e194d SHA-1: 1dad2bbac6f54323229b98e1bbfd8aad9c79a853 SHA-256: ee0119163cc8efae21365a109abc8fe6e14f01006f7648045e38b0f276b335be
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm or redirection mechanism. The heuristic 'SE_SECURITY_BYPASS' indicates the document explicitly instructs the user to disable security software, a strong indicator of malicious intent to facilitate further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://cructi.ru/uplcv?utm_term=mi+dual+space+apk PDF link annotation
    • http://sportingfoundation.com/uploads/file/zakiwoxivejijazonifuzad.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138316dbc7dc---85667681650.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fcd4b6f23---64784077211.pdfIn PDF document text
    • https://stormester.no/files/file/91382994737.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/sixegozikunojodofokilim.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/badugun.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/9e2f85951c0839bec62c20b58f561e82/lovagore.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba5de4a868---57421308509.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/10287691807.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/26707501487.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/96085518389.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/kifekudenajijijimibogex.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/64034541262.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/11143216513.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/10837177396.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/58237467536.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130749757056---dutumuda.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210910093058.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/65916875526.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613419c17fb61---bapowebit.pdfIn PDF document text
    • https://slide-bearing.com/d/files/39464653707.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/bavilo.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45615491710.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_off00017d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D06 21628 bytes
SHA-256: abd104ee14057ea0751a4585637edbb2f4e37bc6ee61dde4e27652602203310d
font_01_sfnt_off0001b5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5EB 10268 bytes
SHA-256: a7e9c0669ac0f88f07cc6bd921e720571ee3b6ccf23da992c144c20b443441ce
font_02_sfnt_off0001cd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1