Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e41b6eca097c2bc…

MALICIOUS

PDF

92.2 KB Created: 2021-09-02 04:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c2a163dffcbbceedd1dccce3e66b28d SHA-1: 69591a3d129c3c90f1e1b71ec21ff4df2f2d28ec SHA-256: 2e41b6eca097c2bc8209c2903c27052b5bac6f24e1236aaafbf4e9549d5f9a6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=streetwise+2+price+2021
    • https://bestcoloringpages.com/userfiles/file/kinadosizibe.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a4daf00a191---62571236559.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a726d21f2---79511005291.pdf
    • http://bjhtdszdh.com/v15/Upload/file/20217412701742.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ae9f89af8---biretiwozekumisizoforiwa.pdf
    • http://taeguektour.com/FileData/ckfinder/files/20210531_133E853E2ACCDE00.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/1d2gd40a1di88q18ul16d137sh/56760764196.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc61e6bb175---rajewewero.pdf
    • http://jmvlpslimited.com/ci/userfiles/files/wubiz.pdf
    • https://canionglobal.com/FCKeditor/file/74649095485.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bdb17125a---23015148634.pdf
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/78080701541.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160858b8db135f---fuluwupukosiwiburi.pdf
    • https://alves.bg/ckfinder/userfiles/files/jifokulibetalelefowefa.pdf
    • http://domeinbeverdonk.be/assets/files/file/23744138039.pdf
    • http://eotp.info/sites/default/files/fck/file/paxabozanojosedobapubaxoz.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/58f4704ee7b63d77635b8080b84a8729/powanojajibatumaleg.pdf
    • http://www.mustwalge.ee/data/content/files/61703346020.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/2obdtfnd1n9ge0iu9f7p0fnk05/xifup.pdf
    • http://chayka-svg.ru/files/37525181375.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5372587cf---kakazajeratozobor.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/30896405450.pdf
    • http://arenabilardo.com/data/_files/pamoduvoromidag.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609b0bd77a682---vodov.pdf
    • http://aldobini.it/userfiles/files/28950052026.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff68.bin
8b923480491aa0263b3a348f76e2080020c0028a39465276ac834786c2d58028
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 10392 bytes
font_01_sfnt_off00011732.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 16792 bytes
font_02_sfnt_off00012f44.bin
399eb123208ce033903c4665f7e66ab77318b0bd0aac42f9be1bf63692a82c20
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F44 19024 bytes