Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a480ae3980bc92…

MALICIOUS

PDF

84.7 KB Created: 2021-09-11 18:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5fc7baf527c937d530d1b7fc301781be SHA-1: fd29f9b21062e607b9abf6d4b627303dc1400a55 SHA-256: d1a480ae3980bc9221cf9075892aaf1f1e967ee6bf91faf0c9e0251adac74a8e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites and disposable hosting, a common tactic for phishing and malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a method used to bypass security scanners. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://irlanc.ru/uplcv?utm_term=descomprimir+archivos+zip+en+android+gratis PDF link annotation
    • http://kulturazebrak.cz/userfiles/80703789712.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/molurusugiwutuf.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/31663077457.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/161322dd63826c---vibuxinageburoxibaroketi.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/pinefojajuvaruniwigaga.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c483c57bfb---77153925961.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/86252331263.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/9329276616.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/55074653564.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/xakebol.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339ce79f278---difaxivilek.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613791e873d02---tekamememazuxiliragakil.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/dajunobavus.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/43371165445.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/45626384328.pdfIn PDF document text
    • https://geloracinta.com/contents/files/28890846763.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/bemovepovisiwenegeja.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/vipati.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/73690923775.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1612f717e09465---94291572489.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/10586152856.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/99054717963.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16137f5dd486db---togakajezasifavatugumijo.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/88769291118.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_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 18524 bytes
SHA-256: 99a04266a1c9df9d62869f028d5de8f9b2b1256430be553db8ff10cba996b4ee
font_01_sfnt_off0001118c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118C 11040 bytes
SHA-256: 2fa78b0fad2d39eac3e5be52f84790b0603ede653c0101916a5fc9cb7f6677e7
font_02_sfnt_off00012aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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