Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea34d5cd940468d…

MALICIOUS

PDF

87.9 KB Created: 2021-08-14 03:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91ff97d46448f3181ef8cd8203f04a98 SHA-1: cc5db6a95fb5be8ff85225cef53e6b7d979f2011 SHA-256: eea34d5cd940468df80264739a03202869b698c553fbedb14265242ff06a8004
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads, suggesting an attempt to lure users to malicious sites. The PDF's structure and link farm nature indicate it's likely part of a phishing campaign, possibly serving as an initial lure to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://stgeorgedentalcare.in/ckfinder/userfiles/files/82146825631.pdf
    • https://demircanticaret.com/userfiles/file/29836965803.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3acc1d70c---14893923084.pdf
    • https://uangraja.com/contents//files/wagozamiba.pdf
    • http://ih-consultant.com/ckfinder/userfiles/files/30879405774.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b2c1cba9f3fc813791040cb3e56e2ac5/toridesipowilutiro.pdf
    • http://casier-a-bouteilles.com/file/bagepegugolaxelowojod.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610e55e2e5061---kupojinanef.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116e2d2120cb---wovevekasinejolanaw.pdf
    • https://chptravel.ir/data/file/73444830636.pdf
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/tixujerituwifewibim.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbfed6bfadf---sewamajuva.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2764eb34---jumis.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/40gf3g5h9p20605u5vu85om2i7/zovejisajuvivakewa.pdf
    • http://ambvetesopo.eu/userfiles/files/38744440953.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gejavufavotusi.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/025ea4dae040f738a66722e184cb7bc5/nutomewedozupizi.pdf
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74117741578.pdf
    • http://galantemontagnana.it/ckfinder/userfiles/files/17622224180.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/36c3b2844590441eb6b98899456b57f8/92379406592.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=minecraft+hack+client+1.16.3
    • 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_off0000f299.bin
5ec103c258b78170e6422a6ce4bb5c87d7360ee946ff3b00c07f003c852f71d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 18092 bytes
font_01_sfnt_off0001222b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1222B 16792 bytes
font_02_sfnt_off00013a42.bin
c2061155309850e092b5ec9810474c5e3861384a2fafc17df2438d0abb4dcbe5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A42 10688 bytes