Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea86ba920c25605…

MALICIOUS

PDF

73.8 KB Created: 2021-09-18 00:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f9eaaf9751a4fff227c7ab2d7cda7101 SHA-1: 95e522576f018b51f9ea0aa7d0a208aa112ee82b SHA-256: aea86ba920c256051150d65edbe871780757adcf7f655f1b3c8fb34e22abcddb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f34c850b9f---89312447712.pdf In PDF document text
    • http://1qjd.com/upload/files/2021-09-04-22-55-56-dQHcDQsI.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/tm1ba25tvsq5ffs0dmutfhu882/sekepulugexapikerofuwur.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/70200588003.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/db4eee0b8c7f7c0fdb925ae375e6e829/beguvofinimaxofosas.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/webopikimi.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/napidoralasorikexirilamo.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210917132117.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/75927121001.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/jokifegosomi.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/womovenujunuwifelufi.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/6f2de33fea5f4bd2b006445092955d79/87143231067.pdfIn PDF document text
    • http://www.somdattabasu.com/fckimages/file/xifofoneropudozajirad.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/26617591705.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/limojozulisizakorode.pdfIn PDF document text
    • https://fishuntpesca.it/file/22909065219.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/xezuxomazagezinabino.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/wovunovulolobobe.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/powadekorunikuxisibol.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/jamagisuzejanulofodoti.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/xedomafeviporobapugononim.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/fagodenelowijum.pdfIn PDF document text
    • http://kco.su/userfiles/file/bofigizegejanasafomizug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=henry+stickmin+collection+android+apkPDF 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_off0000be9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9A 10872 bytes
SHA-256: 65acf8a5789e6e6dd9467d8f089f23aa205b7b675aa3f89eed2512840e1460a9
font_01_sfnt_off0000d7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B4 16388 bytes
SHA-256: f93f3dbed7bf12c993ecd25d754c8f42ac8507e01df32988dd8f05990eb7b85c
font_02_sfnt_off000101c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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