Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a25ef5fafe0ebf…

MALICIOUS

PDF

79.3 KB Created: 2021-09-05 05:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8f7a14a2c52de34f9baec0392062b363 SHA-1: d06d4f3aa6240c00054e9d5e42b2ea9dd40fa7c7 SHA-256: 30a25ef5fafe0ebf89ff64cf27a288c588dae442bcde6bd57acc4bf2eb581daa
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs hosted on potentially disposable or compromised domains. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://smg.bid/ckfinder_userfiles/files/6214580591.pdf In PDF document text
    • http://xahscw.com/userfiles/file/mutasoreneduwatirirubu.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/98939390093.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/30407714903.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/lasokekizomapelivubi.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/pefetesinavebadoxo.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/sorilunelajudodeze.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdbafaef1a---8984817216.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/57341473521.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161198daed5801---ronobomorif.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/xuxewilokigebotiwiluv.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/79953260144.pdfIn PDF document text
    • http://ghefoot.com/fckeditor_userfiles/file/kamuleluzutasixegisufe.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/lejevofiv.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/97853933733.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/damuwefuzolibiwuj.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/0b3852afc0bb5ff8558c069f0afa427d/siponukudik.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/26306117546.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/rowevowaledimikaside.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb4d1283b9---fuwiwiwef.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/13895584777.pdfIn PDF document text
    • https://rpitrade.com/ckfinder/userfiles/files/18242997.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c3e0806723fee30d0e152708de178f00/17792841653.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=handbook+of+fat+replacers+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_off0000d31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31B 16632 bytes
SHA-256: 4bcedd63500f735b4f001c1cf711b6f27719443c58690080dda02184c78ac09b
font_01_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001168a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168A 10744 bytes
SHA-256: 8f4af8d57ac2773d88b5276d0366a6f8de5bf3b914cfd653f7753d7a6287f235

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