Malicious PDF — malware analysis report

Static analysis result for SHA-256 53505bdddfdd40dd…

MALICIOUS

PDF

78.1 KB Created: 2021-02-11 09:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 90cffb044bf4818cf770e45b769ca984 SHA-1: ff3c99d9858082ff04cf7eae35a8edbc0b358bc1 SHA-256: 53505bdddfdd40dd025bd92d7d93da1f76332ff2c8ab4d9036f2688475ea4be7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/aws?utm_term=gangster+squad+movie+free PDF link annotation
    • http://poradoit1.site/easy_cake_recipes_for_beginnersoxyzf.pdfIn PDF document text
    • http://lishop.site/ielts_reading_test_vkvsvan.pdfIn PDF document text
    • http://dektesheff.xyz/bimopebwfrc1.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/salumerifinux_vodefiwot_pivevujinanejad_nomumigipowe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470968/normal_6001f4f664f63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_5fd68302cc1e3.pdfIn PDF document text
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/6396271.pdfIn PDF document text
    • https://tedinuvade.weebly.com/uploads/1/3/4/3/134348171/6364978.pdfIn PDF document text
    • http://btsworld.org/b_f_skinner_theory3anvu.pdfIn PDF document text
    • https://litazivufili.weebly.com/uploads/1/3/4/3/134305244/domojogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuzamada/bangladesh_online_visa_form_link.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/google_sheets_get_substring.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/4919873696.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/5434220850.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/honeywell_thermostat_manual_rth2300b1038_u1.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_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 5412 bytes
SHA-256: 4501f8a98cc2327f05f510e2da6b41c9104fadabc272f7cfd03821634b1d7fc6
font_01_sfnt_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 11176 bytes
SHA-256: fc1de0eafcebe7fcc72944e15c51ff1160e21a7ee0f4cf074bea652b926a5da1