Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e212607caa4f60…

MALICIOUS

PDF

96.5 KB Created: 2021-07-05 22:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5f0964f30ee368058f846861d787ddc9 SHA-1: f7d61ce44f8fb12c7d23477724fd7193f5707a08 SHA-256: e2e212607caa4f608289af08647063b10db36ca6ebf90c47d13b4ff6b98568c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a malicious PDF detected by ClamAV and an ML classifier. It contains numerous external URLs, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution lure. The PDF structure and embedded links indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://huntic.ru/uplcv?utm_term=meaning+of+satisfied+in+marathi PDF link annotation
    • http://keacg.com/upload/files/kizab.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/rdkpd4hh7elvmom3rootum6dm2/39292283553.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/96367103783.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8968cb7a91---vizefesusewumiwabogakivi.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/m54uu8jn6ip42jpbsaouhcv7sj/xedujudijigovelizurugolub.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vkr15s2qdnmoee8e6q995f4qj5/gosapi.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210629_160820.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///75473305837.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/40962449563.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/ae12b756963a054222728baab6683513/29179484642.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079f5cfada73---telejavolozegopodumu.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607432a2c8342---pewatoforaribomol.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9e6b0ab1f068e01dadace3126c7bed05/datosilalofodagudatow.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16082250c2f38b---panewemolagiditulelemite.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/c98e769ebea6f7ca89c807d56b864c8e/rojesebe.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/88200133514.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9e23ef536---datonogopufavidoz.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/82219082033.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d054db3e6d---10656099544.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/10940466576.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/rijoxonijudasixutur.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/5713798c65dc101e4f271e2d3e69927e/nuduwo.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/4qj9j29kfg3p8vsepgd96vu142/33849175931.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/rr1hehbpa01sp4ign60aiol64r/20016732853.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091591f5b884---xifekogufamopimix.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160839480070c6---23615591695.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_off00010b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B01 10748 bytes
SHA-256: c0da38dda8c45c8717b851e389d9cf35e3883cf856d3e93de0e7505978adebca
font_01_sfnt_off00012352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12352 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B64 23048 bytes
SHA-256: c1b0e44e4ae48f268417cff9f38ad964fc10cb3ab154a67742421d2a07707a71