Malicious PDF — malware analysis report

Static analysis result for SHA-256 268f84a434399935…

MALICIOUS

PDF

82.0 KB Created: 2021-08-07 05:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: edbdb66b641285ad7b5b98c1c291beb0 SHA-1: dd8592d1825833cdca32eadb4c9b2ca619802eba SHA-256: 268f84a43439993570f0d637a10671ae9fb2944e6df48dd24f97ba558cd5546c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious File

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple domains, some of which are hosted on compromised CMS uploads or disposable hosting, increasing the likelihood of malicious redirection. The embedded URLs suggest an attempt to lure users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bhsbeacon.com/FCKeditor/file/bubagavedar.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/c3tgg8r3k3so9dp2qjn1guatvn/guzitelirebixusowakib.pdf
    • http://changrung.com/ckfinder/userfiles/files/47865908270.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/hbcf4qnkkb3jubi2m3emakuvd1/sejulorevupozubel.pdf
    • https://buka.ru/sadm_files/39662201201.pdf
    • http://kirilmazbardak.com/userfiles/file/93476499453.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/k4vf7jjteoehv9tb2ko34tv906/gomebapepabakitujepigi.pdf
    • http://dr-onesrl.com/userfiles/files/95472023180.pdf
    • https://hr-serdahel.hu/images/file/67081545121.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160c2aab5db728---wupawoxupelemalororufised.pdf
    • http://angarakshaksecurity.com/userfiles/file/vitojoxiwakedixojaf.pdf
    • http://ubestsports.com/imager/files/20210609030352.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf5efa4a08---nuvekuxogululusuk.pdf
    • http://lg-palette.com/upload/files/20167240887.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/4b2487fc4b02125da83571d1afc70353/83490435372.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a521ac5ad02---niwonefinutifuwin.pdf
    • http://hanleyresources.com/images/peluferulosifov.pdf
    • http://hy-concrete.ru/d/files/vudowizajusaferunotamo.pdf
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/85598205535.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/84534ae51722bbc1d51152c98db4888d/fosukenur.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/bg04ogpk0qg4g2efpj7rtle9tq/46803812118.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+hook+up+ring+without+doorbell
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/134033ab36682227e7e39447d6c25a6a/wotixuzelafekutivivisefis.pdf
    • 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_off0000dbdf.bin
2d6a2ab51b77a10bf5a185286ab0c82dd926c9ab37140bb810e3f44bd048dadc
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDF 10752 bytes
font_01_sfnt_off0000f40b.bin
6efb9bd4519c6a8c87020a0f5097e902dbb48bc711aa5aaa3a8d6880b1a7f51f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 16848 bytes
font_02_sfnt_off00011fe1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE1 16792 bytes