Malicious PDF — malware analysis report

Static analysis result for SHA-256 403056e5f5abc03d…

MALICIOUS

PDF

89.4 KB Created: 2020-11-30 12:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1862085f4dc90328455f10ace8afd39b SHA-1: ef48149320106b9f599f6a87e3cd471dada0ad65 SHA-256: 403056e5f5abc03d4c7b715f2f00d2e5c02f26b3952acf68c8b6f3bb4e43e48f
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, directing users to potentially malicious or redirector domains. The presence of a critical heuristic for malicious redirector links and ClamAV detection further supports its malicious nature. While no scripts were explicitly extracted, the structure and heuristics suggest an attempt to lead users to harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=super+robot+taisen+og+2 In PDF document text
    • https://vozutububedem.weebly.com/uploads/1/3/4/3/134372478/zijulonazop.pdfIn PDF document text
    • https://kobigaxa.weebly.com/uploads/1/3/3/9/133997295/zalunenat.pdfIn PDF document text
    • https://doxujivadew.weebly.com/uploads/1/3/4/8/134875716/nirotedewom_nunuwaro_lokusatogawox_wafaduj.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdfIn PDF document text
    • https://juzowugaf.weebly.com/uploads/1/3/4/7/134773334/046b9a.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/4295916.pdfIn PDF document text
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/c97ef235d091c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc37324df132613bbcddee0/t/5fc4722e1972c46e3c2befa7/1606709807516/suffolk_county_land_records_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0078111f6a4198480da42/t/5fc1ad95f8cdb769c6228ef7/1606528405249/78850685868.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/android_studio_import_module_not_found.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf480cc750a3b5a055283/1606218881115/harvest_intermediate_chinese_textbook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16072e9fc3622d52570ce/t/5fc3babf145a8629dc22699f/1606662848291/56547775792.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee97d334513fae409d2d/1606217371270/song_artist_wheel_of_fortune_5_words.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c273a13a450babf34cb7/t/5fc1d4b85147b14804766ce8/1606538424861/action_verbs_acting.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_off0000f932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF932 11708 bytes
SHA-256: 9c6356983eee8ae33336a2fda32687b2583d9510528a2656af1c9267c67e1b27
font_01_sfnt_off00011f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5C 5328 bytes
SHA-256: e9fe7d3921987a872f8885dcd9cb65fe90ad6b5a1d7f8e1d18cedf7bd67a5ce0
font_02_sfnt_off00013181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13181 11780 bytes
SHA-256: d6efe21d570431340f6c20b33dcd6b190a5061f9dcc4d2354e61c885c487930f

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