Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c2f5e260008262…

MALICIOUS

PDF

81.6 KB Created: 2021-09-16 00:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 013036270d7f83d96a12aa63ae09f9c5 SHA-1: 4da54fdbd7b184e3b66be7356209dd21665b5cd7 SHA-256: 35c2f5e26000826275f7fd86be798461fad421f3114fa7d49a82ca31abc1c17c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous external URIs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the malicious intent of executing code or redirecting the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nomylo.ru/uplcv?utm_term=how+to+share+shareit+in+bluetooth PDF link annotation
    • https://5uempat.com/contents/files/6941384015.pdfIn PDF document text
    • http://tao-ssct.org/data/upload/file/woxibozop.pdfIn PDF document text
    • http://khocabien.com/uploads/files/mawukomegudesejor.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/91055789865.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613464f859614---66323565486.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ff6a6c3b7---woxosu.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/tamogov.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/3003845783.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/df772f70d55bb8dbd5f078c7f4f1d6c4/30393626290.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/vuvamemij.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/pixenu.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/34254598476.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/94621935922.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/65540659377.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/25981383567.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/80543757718.pdfIn PDF document text
    • https://termofriz.rs/files/puvawo.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/mamowezapexife.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/puvitenagipelef.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/81854599724.pdfPDF link annotation
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/viwomiliwufosole.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/zanodamoritetixagovit.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/petibujoluxam.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_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 10524 bytes
SHA-256: 0c2217b113f8da06e69363dbd5a87c4cd18cddfd450026c3f098bb8159014096
font_01_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 17444 bytes
SHA-256: 5d66296cb94e08e52c72e6bd1acb79dd85b3fb3708a8db2239626768bd3cbaa0
font_02_sfnt_off000120ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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