Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1899e0442cdf22…

MALICIOUS

PDF

72.5 KB Created: 2020-12-17 20:35:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 90e512cb6806e115ba02019841fb8dd6 SHA-1: 9a1c0fc5c85fe9a8b83e7b3314c4403cd66fed6a SHA-256: bf1899e0442cdf2292d87a70454ba239f4026e1ff6fa3a6246378d4c7cd6ca92
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly indicate a phishing or malware distribution attempt. The presence of numerous links, some pointing to potentially untrusted domains, further supports this. No scripts were extracted, but the document structure and embedded links are sufficient to infer malicious intent.

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://traffmen.ru/123?utm_term=harley+davidson+watch+band In PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/817bb.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/d070816520.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/1524565.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://static1.squarespace.com/static/5fc0e844cd1e280355d45049/t/5fcd020e33187724c4f494fc/1607270926279/90883549166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c6f76c-e9de-4ebc-b02b-ea416469cc9c/work_power_and_energy_worksheet_for_grade_8.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d593485235c86bcc6bd/1606372698155/rocas_y_minerales_de_la_corteza_terrestre.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf70890503d17fb24daabf/t/5fd188880f163860c7a80976/1607567497695/7258522019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd376e04971d5155d5cdd6/1606236017174/marvel_champions_release_order.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/saxefupasa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54343116eb00e3c68afb8/t/5fc690685147b14804180e96/1606848617045/fosabalixirogipodomoxoli.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50f372e537a05ef23cbd8/t/5fc5bbf47acac6192a889078/1606794228744/gigudefixamobezojiwekebi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe048d3570fb44d1c9ec63/1606288525567/navy_federal_savings_account.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/chaahat_movie_shahrukh_khan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e7ad6609fd0ee79153f2/t/5fc3565f18e72e5fdb427cd4/1606637152223/modo_de_produccion_feudal_caracteristicas.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_off0000cffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFD 5168 bytes
SHA-256: 3cb483a3ca46a113babc000f48511a76f8d2dc5c525d46e3e850daf05059e4d5
font_01_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 11044 bytes
SHA-256: 21ee5c7b909214bbd295277e00c2a2556b151a91572d7724d3a6f4f5873779ac
font_02_sfnt_off00010742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10742 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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