Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45de837c69c08ba…

MALICIOUS

PDF

83.9 KB Created: 2021-05-14 01:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 224a35a38f87bf33e1182cd18aa7dcc6 SHA-1: 21a1dde39ea49c9e948b0ed9a365eb8057640b25 SHA-256: e45de837c69c08baee6baf33c8f0575b5fbec0592123a320009bb762983e3e89
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with several pointing to disposable domains and known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing sites or download further malware. The document body is heavily obfuscated and appears to be junk data, reinforcing the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=que+es+la+psicologia+juridica+segun+autores In PDF document text
    • http://rofogukiluvupu.mygamesonline.org/ragek.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/nukuwuzab.pdfIn PDF document text
    • http://xufikefizot.sportsontheweb.net/basic_computer_engineering_mcq.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/50113541049.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/brgschaft_mieter.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/75369513244.pdfIn PDF document text
    • http://kufejat.sportsontheweb.net/vawakafefike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502436/normal_5fe7bee1725ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5feb617292973.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478716/normal_5fe241f3e6e42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef3449d-1fb2-4377-98e1-994f701831d1/xotulusof.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/itaste_mvp_manual_vv_vw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60409b23-2e2b-432a-8a40-457ae2e10db1/effective_communication_strategies_between_healthcare_professionals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0267aa34-951c-4d9a-9b12-695ea51f30e4/kugajabeleton.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/tadakodelodepi.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/viwavamesike.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/31534696596.pdfIn PDF document text
    • http://movasedumanepe.onlinewebshop.net/auditing_books_for_b._com.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
    • 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_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 5376 bytes
SHA-256: 9f5ecdce60166620d025132c9c1bb01fed296cb9cf52a73eea708e6aceeaecae
font_01_sfnt_off00010590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10590 11612 bytes
SHA-256: a2a388444ede67a555e4536333175cad694c32c8e0f435ea911e4bf8fcf2b29c
font_02_sfnt_off00012b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B33 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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