Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f963e48b317c77c…

MALICIOUS

PDF

85.3 KB Created: 2021-05-27 19:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: aedbcf565f6aff1150cfb4d233952df6 SHA-1: 2fb7d46980696c6273f678b513ddf63e0c3e4d40 SHA-256: 5f963e48b317c77ce486be7387a5233fe185a740c018fbdb72511e579d612aad
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'free Spanish television channels online'. The presence of multiple PDF links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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=ver+canales+de+television+espa%25C3%25B1oles+online+en+vivo+gratis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410194/normal_601ce8c84a0cd.pdfIn PDF document text
    • https://kanemonel.weebly.com/uploads/1/3/5/3/135319287/togumugifina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486359/normal_603dc0b9e9e2f.pdfIn PDF document text
    • https://xiwajobuxeke.weebly.com/uploads/1/3/4/6/134637113/3271911.pdfIn PDF document text
    • https://gumabudisipinef.weebly.com/uploads/1/3/2/7/132712006/5085198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411681/normal_605f61462cdf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474723/normal_5fe9730d32996.pdfIn PDF document text
    • https://lexobazotukagof.weebly.com/uploads/1/3/1/4/131407042/1796409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421629/normal_5ffa97e72eb91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_605812ce1b1c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d55dce08-56a1-4b6d-bd01-6cc42589ddc0/how_to_use_black_and_decker_waffle_iron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef050e9-d30d-429c-b0e7-9f23fbf3e5ab/is_loki_thors_younger_brother.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab09579e-fd81-4519-a2bb-5c7bc6e0c213/steam_api_dll_for_cracked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f36659-d3c7-4724-ab2b-1d5c87939f5d/flight_of_the_bumblebee_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6691e062-8835-4247-adce-a20c1aa4561d/what_is_the_nicene_creed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3876a1e2-e9c6-4783-b635-6ff87698f3a6/breville_tea_maker__kettle_-_btm800.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD46 5268 bytes
SHA-256: 06b37148825e7d5bc292869de75a8ed11eba55d726b983cb56b0e2a24f535822
font_01_sfnt_off00010ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF0 12828 bytes
SHA-256: 75fcc6a8836a01bdc8d9c37ea1a320cc06c63fb5458899fde53c816c7b38743f
font_02_sfnt_off00013715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13715 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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