Malicious PDF — malware analysis report

Static analysis result for SHA-256 982dcf0492eda22d…

MALICIOUS

PDF

76.8 KB Created: 2021-09-21 10:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 500567957a07d2afbaaf27787ce61eb1 SHA-1: b9be382c25839c89fca95cd25523dfb2dd02c948 SHA-256: 982dcf0492eda22d4629dce2623605580e00b6552e410948dfb5e503e2b7750e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. The presence of numerous external URIs, including one identified as a link farm, suggests an attempt to direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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
  • 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://afgventuregroup.com/cfiles/file/sulalisapusi.pdf In PDF document text
    • https://keepingscore.org/userfiles/file/49433864374.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363e2ea9bcd---tofisobumez.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/fuwazufi.pdfIn PDF document text
    • https://nistd.in/userfiles/file/11970061425.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/24683344151.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/32949619801.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/fexaramafupud.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109020028484517.pdfIn PDF document text
    • https://r4binsh4h9-att.com/contents/files/gerenoramowuwepaxuz.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/47569212156.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/suvata.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/161377946b1f32---vatabeworatanu.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/79242083635.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/47394965945.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/11091969177.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jedokatav.pdfIn PDF document text
    • http://jadeite.ru/images/file/rukegajaguvetedagutowi.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/betujiwoxitaturizulusuzim.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/29611100595.pdfIn PDF document text
    • https://apra.pl/files/file/3120711823.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/pirasejanewowusozol.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/27335788619.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/nemetogibafimeped.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/wosumetisonu.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/25515167759.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/97168396410.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+retrieve+deleted+text+messages+from+an+android+phonePDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/xewaduwevuxilurun.pdfIn PDF document text
    • 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_off0000c8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 16252 bytes
SHA-256: e5b924082500d59b737bee13563e151c8ae7e26add4bf2b9d92702b25644a310
font_02_sfnt_off00010abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABC 11188 bytes
SHA-256: 21335146cb2f96335052724d51c13fc196e0a51d3594b6e5123c414bc05bbbe9