Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b778742e5f2c87d…

MALICIOUS

PDF

84.5 KB Created: 2021-09-16 05:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d1e130a5cd381a8437f319411cc6b95d SHA-1: d838d82c76cb780fffae3b114958556d74e5a704 SHA-256: 8b778742e5f2c87dcba7da15915a1a960e6b64b16b3c99027c97eb76c19ee761
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external URLs, many of which are unknown or associated with link farms, suggests a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gadesign52.com/uploads/files/202109121529356361.pdf In PDF document text
    • http://sahamit.net/userfiles/file/gizarulorinolil.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/61454636273.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/34890701743.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/2700493175.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/wezorejadeson.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/83820219007.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/revan.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/76747271256.pdfIn PDF document text
    • http://yejida.com/userfiles/file/moxatorizijofuxanekujuvo.pdfIn PDF document text
    • http://neteyes.eu/editor_up/wenewo.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/25117283976.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161394e4d73887---44105759883.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/39082039990.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/83986301137.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/63757472007.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/204420056.pdfIn PDF document text
    • https://phukienbep.net/media/files/62078216701.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/fopive.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/nifejifepufigo.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/zakim.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/30620901983.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/7295428596.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/firilofimoziba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=moto+g5+plus+clock+widget+apkPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE287 18828 bytes
SHA-256: da0ef34d85957ad3a22882c6877c4829f909e05802398b0812b43117013c07bc
font_01_sfnt_off0001138b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138B 10892 bytes
SHA-256: c6819403f9a7fb75bb1e9b452f0e19955026301d268aa6656586503bc77c9b92
font_02_sfnt_off00012ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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