Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2a9a8fafd4ac00…

MALICIOUS

PDF

93.1 KB Created: 2021-06-26 00:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0de60812c7d195fd93fb9135948457bb SHA-1: 516fe7c8cd26395c8c08444406b00c5227f9899a SHA-256: ee2a9a8fafd4ac008fc514df64911bcde4b9d9126b4354c36e67ec60ba6706a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=barney+i+just+love+bugs
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/5049f3bb56e0c5775cead8cfe4c15d08/rubupibi.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89e3a2d513---gejalusupuwuzajakepopawos.pdf
    • http://sarljarry.fr/userfiles/file/7772416124.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/65b547761bd006e510f877212afe8617/91240706007.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ec942e5e7083bef6b1f7cbc431a45908/17232005031.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160baec056b58c---gukibobikefi.pdf
    • https://amatnieks.com/pictures/image/nasanozejapupimisujixuv.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b337033a833---41752244757.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607996424ffdf---34089007390.pdf
    • http://castrolmintabolt.hu/images/upload/file/57704976066.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160961a30a4ee9---80655180177.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099fc0829960---tusubes.pdf
    • https://latework.cz/soubory/nefebotuvedi.pdf
    • http://cdwy028.com/uploadfile/file/20210529055111.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba4decd424---lixat.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d46b5bb2ec---tibovimezevaxudera.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606e56e5d1b05---8262451945.pdf
    • http://harissarantis.com/userfiles/files/87356676016.pdf
    • http://fixafilm.se/userfiles/file/mawadopuwa.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7cefb1c7d---wegisapomebetedapelenefag.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d25fab0aae---bilutududadajidores.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b83197f5ce---zagijesulofisofibowuri.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c5784fb2f---derotirabud.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108DD 16792 bytes
font_01_sfnt_off000120ef.bin
1df1d4c5101365afc5993f259ac05faef310dd03777648d4453b378ccf7f47ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x120EF 17828 bytes
font_02_sfnt_off00014f57.bin
333665eac12b29ab5fe802c7e65d7085b10c7ffca27b88df3e0256edb3533038
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F57 10888 bytes