Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14924f031bc3036…

MALICIOUS

PDF

83.0 KB Created: 2021-09-19 07:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: edba7ac55e85cfd4c68d0ac26f07334f SHA-1: 146ca91e8c1f37c92b9d59b54b74d13bba54b939 SHA-256: b14924f031bc3036765e254af9d168a2c4e85ea923ea3e55c1129f49601620b1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also contains numerous links to external websites hosted on disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crysiq.ru/uplcv?utm_term=patterns+of+world+history+volume+1+3rd+edition+pdf+free PDF link annotation
    • http://gtlitalia.com/userfiles/files/19489239237.pdfIn PDF document text
    • http://otczenacts.com/media/files/32983467193.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ab6b19189---93540715452.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/8398367857.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/46849423919.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631402398.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/85269883755.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/mageno.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/44902439506.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/sepiv.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9243444c5234437195179694ded14026/75200807977.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/biwovagizozuwitupevi.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/67583168548.pdfIn PDF document text
    • http://dalaichau.com/files/26485183183.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/38110359791.pdfIn PDF document text
    • http://jinyezi.cn/upload/mepifepizimime.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/35720256182.pdfIn PDF document text
    • http://ipceurope.com/assets/file/29611874314.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/63647300219.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/75029907462.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/tozotutepom.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/81237000194.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_off0000dc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC56 11352 bytes
SHA-256: a1f19f13653c2986bda7b7f6c92ffd1300baa4c8241b2de0e834d2f651b5e4a1
font_01_sfnt_off0000f6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 17792 bytes
SHA-256: b03cad40eba67ef80a2834ef9a896ce7ff1afe7be9985459ec464da9baa5c65e
font_02_sfnt_off00012597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12597 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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