Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a84936220cd1eb…

MALICIOUS

PDF

67.2 KB Created: 2021-01-18 10:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3e4d321b0c8616d7cde2bbe8ea6c7fb5 SHA-1: cb0e7307536c654965c0bfd73f3924b508ebcd72 SHA-256: 37a84936220cd1eb378161a8f35d8ccdbb247d75b902965147d63d5d51cf3c87
186 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.
  • 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://baarspo.ru/aws?utm_term=sacramento+city+college+map+pdf PDF link annotation
    • https://cdn.sqhk.co/xoradofexul/fge0ugi/48509874417.pdfIn PDF document text
    • https://site-1168003.mozfiles.com/files/1168003/fiwuzupi.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/fHRJyjb/okay_madam_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/hfLhijp/history_of_malignant_thymoma_icd_10.pdfIn PDF document text
    • http://puzofogerexiwi.22web.org/wordscapes_level_144_answers.pdfIn PDF document text
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/lakemimosovep_lijenag_furijamej.pdfIn PDF document text
    • https://site-1178275.mozfiles.com/files/1178275/jadufimawu.pdfIn PDF document text
    • https://site-1175497.mozfiles.com/files/1175497/42038330103.pdfIn PDF document text
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/mekuvo.pdfIn PDF document text
    • https://site-1166618.mozfiles.com/files/1166618/39356335254.pdfIn PDF document text
    • https://site-1206965.mozfiles.com/files/1206965/gugaliniwudorigevodosil.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/xavot_vuzatifuf.pdfIn PDF document text
    • https://cdn.sqhk.co/vozofugova/wJQgeJo/vegetable_curry_ninja_foodi.pdfIn PDF document text
    • https://jotinebemoti.weebly.com/uploads/1/3/4/6/134681432/jijisatuvumup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxajipemafeb.epizy.com/deposit_form_template.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_off0000c844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC844 5504 bytes
SHA-256: 3c99ff7cb24ce1f98b871f7a753f70e6da0fc557f8b869185883a8728d273dd1
font_01_sfnt_off0000daf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF2 10952 bytes
SHA-256: 038911e8263f875b75f0991799d649622794ee71ac2b651afcb900559d574d81