Malicious PDF — malware analysis report

Static analysis result for SHA-256 921c62202eb123ab…

MALICIOUS

PDF

98.0 KB Created: 2021-09-20 13:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e447e17d83c41224f1dd51dd00acf173 SHA-1: 7bde1952c7baeb7913551f06aa0e3e855b801057 SHA-256: 921c62202eb123abee9b36cc9aea9c99233885ebb1be436470b7d34a33274954
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious content, and a heuristic identified it as a link farm designed to distribute malware. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f972aed839---61894417817.pdf
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/19143431668.pdf
    • http://hkxhjfc.ltd/uploads/files/20210918074834.pdf
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wojifewanijuw.pdf
    • http://pn-tech.net/userData/board/file/fugotebanixedaxixon.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bc80d300b---zatukelemomilexefukonuz.pdf
    • https://stratasphere.online/userfiles/file/94233646574.pdf
    • http://kaiyudachem.com/filespath/files/20210916155231.pdf
    • http://malabarisproducoes.com/arquivos/files/56691919682.pdf
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/zowufamoraw.pdf
    • https://sharedsynergy.com/userfiles/file/tisagited.pdf
    • https://bestofbucerias.com/upload/file/wumolobinakewugemefapeb.pdf
    • http://saconsultancy.com/userfiles/file/dituv.pdf
    • http://cabanagarden.hu/editor_up/mevukomezijagadegarisepe.pdf
    • http://verynailscm.com/user_img/file/35432753677.pdf
    • http://chono.mn/uploads/userfiles/files/92715333435.pdf
    • http://stellarp.com/userfiles/files/bukatosedivififowolebixo.pdf
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/87072462985.pdf
    • http://seoulmenu.com/uploads/files/57843915893.pdf
    • https://togelunited4d.com/contents/files/3878119337.pdf
    • http://newtarrytowndeli.com/uploads/files/kuwekewejazevalupewad.pdf
    • https://gulfb2b.com/userfiles/file/86850935467.pdf
    • http://livestocktool.com/d/files/tuwoxajanulizevotibu.pdf
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/35462630764.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=print+to+pdf+not+showing
    • 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_off00011767.bin
a7f0714863ba1f652f3ffd32527becd1d81302be845ef4ab821aaf8b94828cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11767 19444 bytes
font_01_sfnt_off00014a5d.bin
9fd32bf187aa5aee5730b917d3fabb791a0dfb8ebc4744ae8199f33017360967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5D 10524 bytes
font_02_sfnt_off00016210.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16210 16792 bytes

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