Malicious PDF — malware analysis report

Static analysis result for SHA-256 620b3fe631781651…

MALICIOUS

PDF

78.8 KB Created: 2020-12-18 02:15:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7b04ac7f524437fb9244114fbb8c4628 SHA-1: dac6c7d6c2e4f333af3fec940c9562f227cc77c8 SHA-256: 620b3fe631781651debf7d9afafbb00623ae26156275ae4a312c8d41b667bb00
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded JavaScript stream and a critical heuristic firing indicates a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware-hosting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/strik?utm_term=oakley+kitchen+sink+backpack+white In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5fae4f327fd01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424933/normal_5fb51d6d38ff6.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://s3.amazonaws.com/dazifozixawus/sojelusovito.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/jikuzut.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/cheppave_chirugali_movie_songs_telugu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc289d2116eb00e3c565727/t/5fc36abe18e72e5fdb439b4d/1606642367162/najaxanutimoridukixe.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/annals_of_nuclear_energy_latex_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38bc62bbd7406581738ad/t/5fcdf79333187724c415f0d9/1607333781552/thrifty_car_sales_mountain_home.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/tibunex.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/aha_take_on_me_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/weekly_team_meeting_agenda_template_excel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10f0fab79f442f22a8155/t/5fc14791cb3e0f57717e92a0/1606502292257/71099997831.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49bc61e25426e12eab7f/1606371773488/christmas_tree_replacement_bulbs_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/federewewo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 3300 bytes
SHA-256: 36ec6d2fc071e253f981616d25627445ce4183b9f29042089e724b56117e2449
font_01_sfnt_off0000e8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C8 5028 bytes
SHA-256: 1ae99b889579b2351632e6d34c73a11a289ea803839bb3a9619b40eea49be931
font_02_sfnt_off0000f9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E8 10872 bytes
SHA-256: f6ba5ae8a0e9ec9a6df0be244860842bf80a18fa8bf0e9baaddca95009762983
font_03_sfnt_off00011f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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