Malicious PDF — malware analysis report

Static analysis result for SHA-256 af47a8b5b8d25fcc…

MALICIOUS

PDF

68.3 KB Created: 2021-09-29 06:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ff288060f5bf85018dd727157a12e633 SHA-1: dc4cefd15c05241d75aa88bea213fa977b78a513 SHA-256: af47a8b5b8d25fcc650e38fec3ed60d8e71cfd20cac6e7f6bf5c0696816662a5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • 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://garglob.ru/uplcv?utm_term=shahid+iptv+apk PDF link annotation
    • http://wwm-quanta.com/upload/files/84892613135.pdfIn PDF document text
    • https://kvzriu.org/images/file/55527816832.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/vazakul.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/rajakujasawubotekuro.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/pebigavamurotozukanov.pdfIn PDF document text
    • https://datawire.gr/files/files/baviginafefuditabup.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/kavedikimaj.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/dfda666ccaa9ab864bfea794818e5c73/56720211656.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b11fc3797---fufixedumekag.pdfIn PDF document text
    • http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/49087691076.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/zikutibuwojajutirugojo.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/c0fb070b1d8648bb9ec4efaba0919401/baguwosijabetad.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/tugopovodunuw.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109201323133023.pdfIn PDF document text
    • http://santehnika34.ru/images/file/16427040599.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/99054699733.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/94881735767.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/55239092789.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614008bbadd45---savel.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/69579019227.pdfIn PDF document text
    • http://pasted-radio.de/web/files/letopimotexule.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/wavasimurodusesopekine.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/girukuzatumarepe.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/jomekon.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_off0000aee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE6 10052 bytes
SHA-256: 5c517c1ae3515092534a15e3bf56d62d1a0b722fb74437e3a49812fb7728ede3
font_01_sfnt_off0000c56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56C 14732 bytes
SHA-256: 2e94c25ed4471788adc7c006f9418cc424d4b996812ec54b1fb9ae9caa71427d
font_02_sfnt_off0000ea5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1