Malicious PDF — malware analysis report

Static analysis result for SHA-256 f630c4c7010cefaf…

MALICIOUS

PDF

75.9 KB Created: 2021-06-08 13:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3db184eb7c305d8eace6c78f9495c4d1 SHA-1: afb27be092f138855821bee3cd040d546f82aefc SHA-256: f630c4c7010cefaf3ed1aa69f8b31e2d629c21b260680b606f588553525f4fa4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://dafemum.ru/123?utm_term=birla+mandir+delhi+information'. The document body, though heavily obfuscated, contains text fragments that appear to be a lure related to 'Birla mandir delhi information'. The presence of numerous links, many on disposable hosting, further supports a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=birla+mandir+delhi+information In PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/6561850.pdfIn PDF document text
    • https://nimosawi.weebly.com/uploads/1/3/5/9/135982357/1b6308f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_600f3e0f9ef39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_601d68a2f0cd8.pdfIn PDF document text
    • https://mafukizagodixep.weebly.com/uploads/1/3/4/5/134525221/07ed461e.pdfIn PDF document text
    • https://xamirudanigux.weebly.com/uploads/1/3/0/9/130969419/palipivekapazutujaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojuseraneno.pbworks.com/w/file/fetch/144725262/descargar_driver_beats_audio_hp_windows_10.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144433248/hamster_rescue_centers_near_me.pdfIn PDF document text
    • http://juwelite.pbworks.com/w/file/fetch/144795924/uyirai_tholaithen_athe_unnil_thano_mp3_song_download.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/w/file/fetch/144738651/what_is_unspoken_prayer.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/nakewaxukitifux.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/lutekavalogalafapudi.pdfIn PDF document text
    • http://vonodatob.pbworks.com/w/file/fetch/144768675/dujinenutevutazavibe.pdfIn PDF document text
    • http://nozobitativi.pbworks.com/w/file/fetch/144551409/acer_nitro_5_doesnt_turn_on.pdfIn PDF document text
    • http://muzupusap.pbworks.com/w/file/fetch/144717150/rudizugafuziliwipagel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e208170-08c8-4a02-8bc7-f92b6379794e/how_to_use_networkdays_formula_in_excel_vba.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/92457652540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea226bf-2c51-4035-8f0a-f0436f6878b2/36187097062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8475758e-fb2c-4e79-84fe-cad856df1f9e/grammaire_progressive_de_francais_debutant.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/w/file/fetch/144514626/buravelawenezejaditej.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 5016 bytes
SHA-256: 3622192c11713a55f12e87feffc98c9ba8ddd44e603262c3d30df94e13eae91c
font_01_sfnt_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 10684 bytes
SHA-256: 51752b1249946831177524721c41a0d682ceb4fc5aefd0fa314c353da56c7fbd