Malicious PDF — malware analysis report

Static analysis result for SHA-256 a751c10cfbea4ceb…

MALICIOUS

PDF

89.4 KB Created: 2021-09-20 13:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c84d40df3c14d3a6b3ee01a56fa567dc SHA-1: 2c158d514bccb0244eddcc259ac40507da325cec SHA-256: a751c10cfbea4ceb2efeba324d564b119ccb8fa47679c97ab4d58b37e5653968
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to potentially disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the 'link farm' heuristic indicate an attempt to lead users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/5b2bddd37f787e7b27b1ce6590fa6980/vaduwubupid.pdf In PDF document text
    • https://armagedonspedycja.pl/files/file/sulixevidijufebu.pdfIn PDF document text
    • http://epplast.com/files/file/85234574321.pdfIn PDF document text
    • https://zagi.hr/files/17780819111.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/27906547191.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/bulaperawebuwut.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/41300811514.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/95868915802.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff5fccf71f---29823279427.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/jajozopedaf.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/fibomiremazigunanola.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/83548548122.pdfIn PDF document text
    • http://stagticket.com/fck_upload/file/73967329068.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/54526712988.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/nuxisamipewekofim.pdfIn PDF document text
    • http://bienbao.net/uploads/files/wapepawojenu.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/bafexuwi.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/75061065766.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/melopudozefunitomemetor.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/polifanutifoxogu.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/diwifefikevetasalotixega.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/manolurojuxapu.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/59602294871.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/tepapot.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/dajisefelexiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=t+mobile+data+plans+familyPDF 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_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C4 17728 bytes
SHA-256: d15d2ae8373ff29774f848e78aa1ac6c599cb930b39c065de5d46c393aafbd94
font_02_sfnt_off00013f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F46 10776 bytes
SHA-256: 26369ad89b052b517cc6ce222ab8f3d11b84d84fbf67bf03db94ba0097dcf1ab

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