Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c79e05380209d0…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 07:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d3b0ca2f8098dd6540bff06f066c9cd4 SHA-1: facfccd877e093fd34fedca869df43a60c852d09 SHA-256: 55c79e05380209d0d1c58f1886ca0874f7ba2b7f27468112e205b199eb157f04
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded links suggests an attempt to redirect the user to malicious sites, likely for phishing or to download further payloads.

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/wix?keyword=lol+lil+sisters+series+5 In PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/7afbb146421d1.pdfIn PDF document text
    • http://rizaxezo.iblogger.org/81852273850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423728/normal_5fd2c10a64d64.pdfIn PDF document text
    • https://bajurajatug.weebly.com/uploads/1/3/6/0/136054821/4e89be.pdfIn PDF document text
    • http://tefituguj.iblogger.org/46303739358.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/2Akjeif/qr_code_reader_scanner_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/OYhfsig/040_aluminum_sheet_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/wdII3ge/toolbox_widget_socket_organizer.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/wirevadijidonijimera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_5fdb5a72d1070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwegovufa.epizy.com/88774936397.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/synthetic_turf_installation_guide.pdfIn PDF document text
    • http://mopituvozu.epizy.com/famafesizivaxaraxavob.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/35365620286.pdfIn PDF document text
    • http://femejedad.epizy.com/warehouse_associate_interview_questions_and_answers.pdfIn PDF document text
    • http://gobavaduxa.epizy.com/stocks_to_buy_now_under_100.pdfIn PDF document text
    • http://zezewesiwakoruw.rf.gd/22243473093.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_off0000ef53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF53 4536 bytes
SHA-256: 46964b0c09f8b386449a96997535c28f6072273f2ad42baebfd7ff9c7527263d
font_01_sfnt_off0000fed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED2 11188 bytes
SHA-256: c11427cf2a933ca3dd8f4bb0bdbb8a2dd923158025547060c4c5281709d59e1c

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