Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c2e9cbb5d8abf4…

MALICIOUS

PDF

88.1 KB Created: 2021-07-30 09:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0c78631ea39c236dbb93604ae6b0be37 SHA-1: 8f6b5aba40559315a7e4639bf838d0dba2701087 SHA-256: 20c2e9cbb5d8abf4015ab1ab481104e78d4d7da42140b05af3a4d600d78bfe8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF that contains numerous links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of a link farm on disposable hosting further supports this, suggesting an attempt to obscure the true destination or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db2dabf2928---60369067161.pdf In PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/10142923588.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609122ea0cac0---detajobirekudegup.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/xenasesavubaj.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/a27c0ed7602347cfa702a062c164d9f6/mokezexugi.pdfIn PDF document text
    • http://oakgroveschoolheritage.com/clients/b/bc/bc5c94904a1f00f1300372e6f875146f/File/76088123745.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/manoxefexunel.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/i5mlakjb4t322h7iv2ebm2f2ek/74120982218.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/rapoxuniwusedededut.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/pabanumugejidotu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/9ae850b1d507f8bfba446f6d165ec350/25132959031.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/e76a78a901c310ff6afe122ba3feb875/kitadevi.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/21328064326.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/9d0667466c58a0fdd32009851c3c0bed/91857037253.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/22987004073.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/mexevefopibavajokik.pdfIn PDF document text
    • https://j26clean.com/upload/files/91461392917.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c53bb57c18c---82052087148.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/fidepujupop.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/nuxape.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/tinoxakiloduvefuginopuva.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/79db2dolbr795nld83kl6g71ih/26689678077.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/sekixexubabigopopulukilar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=johann+heinrich+pestalozzi+aportes+a+la+educaci%C3%B3nPDF link annotation
    • 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_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 17276 bytes
SHA-256: 4b3d42d239200843948ae95018680982250f9d6daaecb9561356e0ffb072b291
font_01_sfnt_off00011de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FF 10900 bytes
SHA-256: 83b5a231572d8944700c6f4d232174158f0de69093862074a55b05e2a4c57863

Open this report in the interactive analyzer, or submit your own file for analysis.