Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e008dc48d708ace…

MALICIOUS

PDF

83.5 KB Created: 2021-08-14 01:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 27fe77575b45af2825d312c4a861f9d1 SHA-1: ec32419bd59a8441be22ab99734fcdfc93124148 SHA-256: 1e008dc48d708ace5ad0a1718268cb378facb59676e39e4303180ebd17d5c212
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. It contains numerous links to compromised websites, suggesting a phishing or malware distribution scheme. The presence of a link farm on disposable hosting further supports its malicious intent.

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://mariautonoleggiomarsala.it/userfiles/files/2886443261.pdf In PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e1c2539338862692fc87140d04cee6bd/4507948609.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c9b1c2dfff432ab809af14965d0a0d2b/luviluje.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/44348227760.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af2eb59380e---ladej.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/4015e99c795b4cbf025c8d952f45275e/nemuva.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/5be27faeb4fb25b6af19a40c206b365e/86458029828.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/tomorojimitij.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/63414481067.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/nadijapawupilukalosonir.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/32777800234.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7a5f5febb---wabazuzupebekefilaji.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa77c08a875---jonoruzeloda.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4dadb1fd7---zujovunopudogimilafewakas.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/pipopafedarefezurivad.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/39310768973.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/30297081510.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/25478434129.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/sikawegekixaz.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/nevomuvufoxifij.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/zevutaxigepuza.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/bb5e1ee12fe087d9ea03a8e68fba1c7e/87221729511.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/jalugegufetujudukomen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=solving+equations+with+grouping+symbols+worksheet+pdfPDF 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_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 17024 bytes
SHA-256: 9def52f0a9a0844a366ac889668f579661a650aa24db840d689639c1d591ea9a
font_01_sfnt_off00010d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3D 11764 bytes
SHA-256: 2019b9772eb8bc03789b6141c4447317d5ec648011e89e988421681b7995f6f0
font_02_sfnt_off0001287b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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