Malicious PDF — malware analysis report

Static analysis result for SHA-256 300583b6d8e8f21a…

MALICIOUS

PDF

142.4 KB Created: 2021-07-18 14:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ab70108d036a96c646dc138e2d2e345 SHA-1: c5b8c9ba2cfcd572252dd4c40503914ffacf445f SHA-256: 300583b6d8e8f21a7da3cca53eaa921d048906d6d4278bcccd48b305a5ae38cf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9400

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.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160874072cca07---resagez.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2abe7bcc0---80092005602.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6df085bda3---64828523695.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/e28a77289b25b22e5a6731c1af9d6ba0/farobelametovemidenixu.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609d57f4a8583---sorategujavidinotobifak.pdf
    • http://nowyhotelik.pl/userfiles/file/dupadebamonamolizizuwip.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/9ivo6nbhtrgo8defa03501mruo/ditana.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c785e68feb0---nukumevasaxiwewo.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afc314a287---tunelux.pdf
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8082760423.pdf
    • http://classicalgardenornaments.com/uplds/file/58321688686.pdf
    • http://fioredda.com/userfiles/files/dixuwovujibataruzaradudos.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16095361a07222---farekapipelinon.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/08017bfb8d3dfa12a297b8cd6462dc23/degim.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608038f9167d4---zegixovofala.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/b5cn8rmu8csmm1guevj9gm4eqk/mitipugapisipokuzozibo.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c2237e19a---ladaboraja.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3e5013fd0---vexepivodemijoto.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9cf61818e.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/52f51e306aaa54e2b9fea6f04c2f4e72/wemojofinukadadekuvunux.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160739af0075db---81745428399.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606da43ce32ed---78236343235.pdf
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9ecf1465f---didepiv.pdf
    • http://alexhofford.com/temp/files/file/wegotemazavajazofa.pdf
    • http://grandchainfamilyfoundation.org/clients/85333/File/66376402066.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/6tml4nkktt30gl9fc3dkhikhei/talazageliluxajogob.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d2e9b5809---wexewimunexevupisir.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=cat+from+fruits+basket
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b4fa.bin
cf6b02a695d16169a7479e164a98c2e50140fe2360f3070261314f4705a79059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4FA 5992 bytes
font_01_sfnt_off0001ca46.bin
7040cce6dc77faaff6af52f006aaa768edbbe58e20267e3843d211f99288e6f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA46 10588 bytes
font_02_sfnt_off0001e292.bin
f2a31c88a6f95e28c6d9d047c2f504861fc81e733ffea39606b212eeb8801a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E292 18272 bytes
font_03_sfnt_off00021166.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21166 16792 bytes

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