Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e84ddf23853a65…

MALICIOUS

PDF

96.5 KB Created: 2021-07-19 17:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bdb694b054d1efa917e00574f0068ad SHA-1: 239f3c86b76d3fe84cf91ebcdd109a915cef3d22 SHA-256: 76e84ddf23853a65dbcff1d4d3afb9b496aa098d314e01f84efa2f0c678f9949
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links are likely designed to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb76e97ff0---rufubolofipilobakukez.pdf
    • http://altelaw.com/uploads/image/file/mixam.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/55285560082.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/ff13b61889db72f3ca3b10e767958ece/44152377491.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c44aee3321f---lipujejebebavawapab.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/mf2vh4kdbl8r2lroa8jn49i4hg/migotagokima.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/menunoxemaroninidasifi.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/3d4ce83964d75940a8959756ccc6c181/75948478696.pdf
    • https://mintedimages.com/ckfinder/userfiles/files/wuzevaparu.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/3dc57ba9306a8931ff132884bc7900e3/zamaxusifenujafugojowup.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7abbd71e3---8371290711.pdf
    • https://diedacorporation.net/freesiafiles/file/tegamekibagipa.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/ea22bfg31simrbsaqrv8qhbhjd/visemugurataturixugel.pdf
    • http://coffee33.ru/archive/file/pemevumarodi.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/2tmuf3qvnp331g6hvit1fes9ob/93913587115.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d3bba0606a4996ad727a12ca82e55aaa/sejiwodumadaxiwiwovegojag.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/qnlks7f3bl1mc4u089tdi3jlsl/vuzipotelawukikifofimi.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076116b4e28e---tatamurogufotiwi.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf4f992d41---82579887267.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160784b107bba2---jenavuwa.pdf
    • http://bjhtdszdh.com/v15/Upload/file/202151292527305.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/0843befff9b2add09a07ffc735c2fb40/19768667451.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbe2e64cf9---94479816679.pdf
    • http://accountingworld.in/singhania/downloads/file/32813995179.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+get+the+poo+dragon+in+dragon+city
    • 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_off000113bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113BF 16792 bytes
font_01_sfnt_off00012bd6.bin
6648a2518daf42613928d8177a4ba2f99e790d83030364cf62ec9064ffdbccb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD6 10768 bytes
font_02_sfnt_off00014460.bin
84f771d6c4e0dd6e6236b972f7370cf073d4d71baffba9409975f97cdc27f16b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14460 17836 bytes