Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ec8ae181187489…

MALICIOUS

PDF

102.7 KB Created: 2021-07-13 16:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 09f785292fdfd2244d9d3746375711e3 SHA-1: fbe7c4d0432bb6c18edf5480863a63455e1db3d8 SHA-256: 84ec8ae1811874898bfd5fe8f1d9573553b32152800a59d2de8329c15fb3dc17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9847

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 http://eiak.org/upload/editor/files/tewap.pdf In PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaad805cdb---40907097739.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///65815967475.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/347d92d2e5558078c4d2ab7140f3971a/86069261498.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-26/20210626043347574942.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088324032390---93757454173.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/ee761940604353eceb5bf6174da016ae/pewivugosegafu.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e516cebdb---98486106831.pdfIn PDF document text
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/woxojutalojesazabazimek.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/61658459358.pdfIn PDF document text
    • http://mldinsaat.com/image/files/fisozizabetiwapubedaret.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/72588682064.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/45ce30c7630eeb574b489c4e897b9274/53055678976.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/3e2c9779d1a989b0a3fac068aadc5a2a/87322156229.pdfIn PDF document text
    • http://fittbike.hu/files/file/75336107613.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/e958c74c9b84150103bd577ac7cb1938/jevijuvuju.pdfIn PDF document text
    • http://gawhs80.com/clients/873705/File/28046151266.pdfIn PDF document text
    • http://4bx.pl/public/file/25341652990.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/4df93db43d1c2362192439b46fa08e22/tosokexegutujokawuke.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/df4qk1f5kepkmnb0a33gp31hg0/31083491248.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/nurakaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=find+out+definitionPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e95f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE95F 19860 bytes
SHA-256: 0985b5106be6218204e5106a786efe8e8c0b72576847adeab0dc860706e089a1
font_01_sfnt_off00010bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12414 9948 bytes
SHA-256: 1a498b109467552a098bc91dfaa3886668528bfca81cc0bfce4e4e18bdd9414c
font_03_sfnt_off00013a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A22 26348 bytes
SHA-256: 38280c37077373fd43e7a82a24ef8555c6ca8da7c2bf6272b0ee459039c1a21f
font_04_sfnt_off0001791b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1791B 4976 bytes
SHA-256: 9e285857ca497ccb37d4c244f7d976a4aecd09a4cf6ed0e3e33bff0a007ddbc6

Open this report in the interactive analyzer, or submit your own file for analysis.