Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba1848c463613d5…

MALICIOUS

PDF

76.3 KB Created: 2021-08-09 01:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 628524a6ae982a31a8b2d285ae33e3b5 SHA-1: 9663e78c65d3a032d6ab30a03411a5beecd3e284 SHA-256: 2ba1848c463613d583b43cdea7df54ece93414106312ab63584fe67dac4223dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or SEO poisoning tactic. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to redirect users to malicious or compromised websites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/739fb0bf2e3fc831c8cb749184541bca/xugururew.pdf In PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/zakivudofasugimabuzisoluf.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160914d8926045---28585060185.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eda02a4bf8---joxujeribi.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/jelorofu.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///guloduramitupera.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/86284019779.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/2c7cb73449f53146db5cd4d3ebe4a4a1/kifagi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fe2c95fb8dcde1bd691eff4a7a7c345b/danabufepabevibekizes.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/dejazuvola.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160e9607a0091a---kujam.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/58577403914.pdfIn PDF document text
    • https://ridersshop.it/file/rozojamexagul.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/c3387798df5fdba92e02bebc8b619b03/jelotewokorel.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dee1e974f46---89907202607.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/19605992001.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/jufuvogidapabijafad.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/66806d286033e7f7768046fb0e90c565/watixegubavasu.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/lufosuvinasobunaxutukosa.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/wugipanol.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/zobenedalodi.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/faveforokipedekudunazosid.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cbdcfe780c3---98232572351.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/627503dc21ab699b814b42a893fa5d86/39754476821.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/19965917093.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/dezemavupodelevo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=zimsec+a+level+mathematics+syllabus+2022PDF 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_off0000c6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 10796 bytes
SHA-256: 2891e7436d96cbf4547fabdf41d10b2549e97b717f047db0c9d074a11e595865
font_02_sfnt_off0000f7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 16684 bytes
SHA-256: bb65bd7ca0884534b654a2a9cb0cc74cc1e29cd6c3c3a40355c986d5e4a7bcc1

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