Malicious PDF — malware analysis report

Static analysis result for SHA-256 207aab2319e46c27…

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 18:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 43a6e96dc3c0d90649316087e56e4be6 SHA-1: a8588b7cf40449a4e5490309e4f242aa2149103f SHA-256: 207aab2319e46c27da5a333b6dc4fd6206fa5debfbc42be0805495c49c9a54c2
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The primary attack pattern appears to be a phishing lure, leveraging a document that likely attempts to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=automated+irrigation+system+using+solar+power+pdf PDF link annotation
    • https://jkmart.net/FCKFiles/File/10243008655.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/99084919465.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f4b9f42628---40316445250.pdfIn PDF document text
    • http://mfcpavpos.ru/file/toxovuwudetevujumelakemak.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/d655f136f11adb606cfaa11090c5d7c8/rilefebopomufubavo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e36ad2e795ad2759fa73b11069e45889/ninepepa.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/23487349291.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/95625047686.pdfIn PDF document text
    • http://dd-eng.com/files/files/fowidulezenategex.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/77605921005.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/gilotazanefikodobeta.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606c76eaabcc1---fivisego.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c493c78ed---sutufifavebopoloxadijin.pdfIn PDF document text
    • https://samowar.ch/upload/file/tugelidasunukiborebup.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e0da3c8e2---80890593419.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/66712797237.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5319dc5780f890ac933397a7278ff7c5/21487218546.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/ziveresakulajisefinar.pdfIn PDF document text
    • http://puppiesjust4u.com/clients/c/c8/c8a8d0e690f73854b1e7a5fbb9521f82/File/20088338775.pdfIn PDF document text
    • https://ksuskalology.com/images/file/21256998988.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/gesuxogil.pdfIn PDF document text
    • http://aven.su/userfiles/file/45508128181.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/xedelidazijemavafipe.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/lddbrgoghf7vi48314sv5sdb6r/53398997102.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/85322942861.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_off0000ddea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FC 17964 bytes
SHA-256: 81eba1c8f1b458b8fd0b1923d00b2ded326bdcb9b153e66c9c1ca3875749b834
font_02_sfnt_off00012519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12519 11124 bytes
SHA-256: cc488119003fc640171fed2ccb3ef053080c99d5519c10eac464900dc5ea3f53

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