Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea93a720d13a5a2…

MALICIOUS

PDF

89.7 KB Created: 2021-09-17 22:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 46d619988a5851ca829ec5f12b97a6e0 SHA-1: 7637d0eae83584db853b80482aca3531ea51677f SHA-256: 2ea93a720d13a5a2925142acaf569e975ac03b062fa29a2447ec9d601d7234b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that function as a link farm, directing users to potentially malicious websites. Heuristics indicate these links are on disposable hosting and some point to compromised CMS upload storage, suggesting a phishing or malware distribution scheme. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=hollywood+historical+movies+in+tamil+dubbed+download PDF link annotation
    • http://huthamcauquanggiap.com/upload/files/mijoxuzovojitura.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/73482815269.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/86666911279.pdfIn PDF document text
    • http://bluebossa.pl/files/file/37895986785.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/vufebixepavat.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/68812563315.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/piwebapumaxonusejel.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/22364252083.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/lozizu.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/kezutesoxuxuleweruj.pdfIn PDF document text
    • https://ms01bet.net/contents/files/xajugo.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/vebekokedobufolije.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/zurolekasebafanizusifutux.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/pelovavufaxunipazuzewa.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/38090829887.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2c732a04e---53052136622.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/351d473becd0fea9b048acc8296321f0/63914518545.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/xivafekugiv.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/bevukusabuvefajejon.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/55254218667.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-3/20210903195701801264.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/dobakaxanabevatopuxijulex.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_off0000fa25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 11132 bytes
SHA-256: 252805f0915c9a46dea5c8fea7e5be426653d6c2273f28c56cf21d8fa57155f9
font_01_sfnt_off000113f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0B 17320 bytes
SHA-256: a5a38d5f1af75f47fe7119e943fef37f9f058f37009607c185fce8aa54fcbae1