Malicious PDF — malware analysis report

Static analysis result for SHA-256 3192316fd3176ce6…

MALICIOUS

PDF

79.7 KB Created: 2021-09-16 22:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0a92ce3d999f70136e29f38e1c56d73 SHA-1: 61a00d8632126110a2085cf0d4c2c42547c03c48 SHA-256: 3192316fd3176ce61448c24fd0a73bd60bdea5b3dde57dcbf171a0290d9df46e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://tradingcall.in/ckfinder/userfiles/files/diwapizejukesufa.pdf
    • http://watch62.ru/files/files/zezobixobunojakovejad.pdf
    • https://k31szmq42-nu28.com/contents/files/wiloxarimit.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/79973231778.pdf
    • http://starfishdowney.com/uploads/files/fuvobazel.pdf
    • http://shinaval.ru/userfiles/file/popifusesa.pdf
    • http://bladensburg.abwingsmd.com/uploads/files/nidiwatez.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0421765e8---dodokiwubikamam.pdf
    • https://goacetours.com/ckfinder/userfiles/files/jonodevanijumototatifi.pdf
    • http://tznjl.com/userfiles/files/14282616026.pdf
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/jaguso.pdf
    • https://magicdiscoradio.com/userfiles/file/37220617562.pdf
    • http://rfychina.com/upfiles/files/16313111522826.pdf
    • https://simon-daulte.com/ckfinder/userfiles/files/romuregomosevozofokeje.pdf
    • https://phatgiaolongan.com/upload/ckupload/files/63054256143.pdf
    • https://gruntbudowa.pl/files/file/67669461792.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424567a600c---98298238364.pdf
    • https://mimpiindah168.com/contents/files/rajaxili.pdf
    • http://aotwresort.info/ckfinder/userfiles/files/pafitikataranejizek.pdf
    • https://1000families.eu/userfiles/file/974628066.pdf
    • http://eastcoastbiker.de/sites/default/files/file/38479776604.pdf
    • https://paulogomeslda.com/userfiles/file/96371093715.pdf
    • https://ketex.com/trcgp/ckfinder/userfiles/files/wagidalovoviv.pdf
    • http://vektor28.ru/userfiles/file/fatugifede.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/eafd155f27acaaff24b6e605b99e213a/54401180732.pdf
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/selotukelanagojigupoji.pdf
    • http://gidaero.com/upload/fckeditor/file/ziwujomo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+get+lucky+patcher+on+ios+2019
    • 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_off0000d337.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD337 16792 bytes
font_01_sfnt_off0000eb4e.bin
b22b1c72d5241770710231bf6634b976d0539fbf3b6ec9c405266c1b1c580e98
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4E 11500 bytes
font_02_sfnt_off000106a3.bin
902d8c9903d62ef7cdd4ac3ba6d13a6b5f429b25f160c176d14eac46e35d0811
pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 16488 bytes