Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eca147da521b4a6…

MALICIOUS

PDF

100.5 KB Created: 2021-07-20 21:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 510180edfaa5d6e7f6a7213200d24b71 SHA-1: 2fa34046b19b380b88ada115e6b245a5a9553165 SHA-256: 1eca147da521b4a6f39ccd1c45e292abe768c012dd6136f62db82691c7e5162b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and the nature of the heuristics strongly indicate an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/44cbebd64f30f3d1dd02ab534a4329fc/gazapibosabele.pdf In PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079ed804e0a0---jibaj.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/kunabisuxuzaluwepunedila.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/j17m58f09o7v435cict5g4ejj0/87771279309.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160764c476a7a7---wiwukojosufa.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/fewitabavedikakitab.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/e4dc79ab763279965a971ed4aca5e44b.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/paronukuwavogoguzemupa.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/57350109878.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/f04fv7rgvsp3eibnkhdvtgm4ci/53760126420.pdfIn PDF document text
    • https://johanbjerke.se/userfiles/file/48332043857.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/wosagotos.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/vosifasinovawiwesezap.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c07c2676d38b71abef754a43cdca84a9/94917192256.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d46e5595a---gomotenokenetolekaguwovix.pdfIn PDF document text
    • https://viettrungson.com/media//Files/sopaga.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/lipiselebo.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/zovafewiduwo.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/38582827773.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/70659832972.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/74571657754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=need+for+speed+tokyo+driftPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001113f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12950 16084 bytes
SHA-256: d11bfa2b02c462a3f9075532ce7ec1132ca3691ccd6a850e0dcf0119a218c04c
font_02_sfnt_off00013e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E84 18012 bytes
SHA-256: f29d678a0067844d4adcaabe4a76f4b89971afd8d659d28b59e919bebf2a0784
font_03_sfnt_off00016d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D95 10364 bytes
SHA-256: cc9b623bec0d2858f1052176dfd50256ce588cb5d53eec7f606fa3821c4277c4

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