Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0889bd4426245d4…

MALICIOUS

PDF

91.1 KB Created: 2021-09-06 11:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4512296d365037af70ea9654f5468faf SHA-1: eeb79088a1e6df35fb3dbe0886cac88fd0c9ec88 SHA-256: d0889bd4426245d4769b046b77c27c754cd9274355ed24a4f41a2ca7d7585b53
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pcstaiwan.com/ckfinder/userfiles/files/wozofabeleletu.pdf In PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/kr1e09c3c0fr84ib0lqdji1352/1651449963.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096d2daa895f---29920811628.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/sojoborurunafitetebax.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/9b4392ad69da2263a13ae005441a68f2/palolawuka.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/97831661746.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/2nl4i15tbgikkkcng9jaiauljh/tipomi.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a916c57fb36---69155199678.pdfIn PDF document text
    • https://tdfstore.it/file/12292169330.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/nasavigimavoju.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/76882823955.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160e59a64aa705---wawixerexazipeniruwiv.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/tojube.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1e2854366---92369869795.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f49c22b46---gemofolakimi.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/jasusane.pdfIn PDF document text
    • https://dintek.eu/uploads/file/mebivakadabikewosojodagav.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/67744820563.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2df0af4f---85128072143.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/zebuvugilelod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+road+not+taken+worksheet+pdfPDF 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_off0000faa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B4 20580 bytes
SHA-256: 5ee1d029692dfa26ff463d3997c146a679c711ced68b34e16be8155afd2ba64f
font_02_sfnt_off00014710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14710 10600 bytes
SHA-256: 93e8af9160b8adb8fbcb5d83886d10351d1f771ee668a148aac9c54ae6e92a4d

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