Malicious PDF — malware analysis report

Static analysis result for SHA-256 0089054d918e3794…

MALICIOUS

PDF

105.2 KB Created: 2021-06-06 22:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f9fa9ae408182cd73be43f92066079f0 SHA-1: a3cd8c3c91092ab3bb60dee2891407b8fc7314f4 SHA-256: 0089054d918e37948ce997934ed430abfaaf5ea461052d1b7a79d4a7ba49e089
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://crysiq.ru/uplcv?utm_term=agastya+samhita+book+in+english PDF link annotation
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a072d1d54---pizibimidojopiviz.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/01b4309e2f126e6096ccd54ab1f7a491/85339676881.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/541a1e6bac7a2352d0c172b531efd345/kenaduzudifixebuwopodexe.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/vajedixugodewinumirosaki.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fad963a5e1---68639325256.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16096416ba7e42---49308122464.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5347b2bd7---jamefidadepulelolopifisuj.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79da4a53fb---zazulapikanezufijemogowam.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b354c097d---zeliwugimalalinorivowevux.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/bb5aa622f95536f86d68c1377430bb21/62203076222.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/965942986.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/68c39e3ee4f865d1d3caef44ba48a063/84351214637.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/0db217f9e81b5b22bd57e999e1a87b07/ruvilifepukefanevagazis.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926b7c25ed9---kelomapulonifuluso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DB 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off000121cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CF 5084 bytes
SHA-256: 5954f76b7125283c7a5c2585c6a792611e92233af79aa986162ea20c8a88e5ed
font_02_sfnt_off000132f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F7 10220 bytes
SHA-256: 29b2311039020df0385d30e88623457ddea2910a6678cdcdcc14cf97395e15e6
font_03_sfnt_off00014dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCA 12324 bytes
SHA-256: b0bbf2184b201003d85639bb7e79b8bf6553cc5f0cb0c22a46a6a567a26cd09a
font_04_sfnt_off000174de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174DE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_05_sfnt_off000182df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182DF 5788 bytes
SHA-256: 13cb4a8d11606de6856d562f7a5a615cc8243a34c3325883c1663c32030b3b28

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