Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20e004008f0eef0…

MALICIOUS

PDF

88.0 KB Created: 2020-11-23 08:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20496ee6f80e81497e52553de25d8c1e SHA-1: 1b74aafb63d9aa0d3dffe0331669e90a805aec85 SHA-256: f20e004008f0eef0c0089a41e80b4e2817077d177ecdc6c416387b005d9e6363
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating it links to known malicious redirector infrastructure. Another heuristic identifies a link farm of 26 external PDFs, suggesting a coordinated effort to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=verb+form+of+address
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/digijovuvonave_bewebijulide_kevewotiga.pdf
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5fae497b40eb3.pdf
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/pimev.pdf
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5f9f7e123f93d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://s3.amazonaws.com/dudujopixejikug/10010941360.pdf
    • https://s3.amazonaws.com/dirijazi/fun_facts_about_conflict_resolution.pdf
    • https://s3.amazonaws.com/numunenoji/sivapoxolupivo.pdf
    • https://s3.amazonaws.com/sorapobuk/collecting_data_worksheets_7th_grade.pdf
    • https://s3.amazonaws.com/kujesulad/76026460289.pdf
    • https://s3.amazonaws.com/nerugiraxura/receitas_biomassa_de_banana_verde.pdf
    • https://s3.amazonaws.com/fizup/alien_periodic_table_conclusion_answers.pdf
    • https://s3.amazonaws.com/tesasubawalozan/camera_icon_missing_on_android.pdf
    • https://s3.amazonaws.com/pazifetanegapu/antivirus_bitdefender_total_security_2018.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d09f.bin
596d98a6a4f1919be6d7aa73f7b277910789d4110c52e38749b5ee16d6fe3ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD09F 4920 bytes
font_01_sfnt_off0000e202.bin
c9f9958b46b562a17583178f9d577f0b0d284bb8645f84a8cbe50605cfc6746b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE202 5124 bytes
font_02_sfnt_off0000f34f.bin
eb729d12d7b24348f07012d212092ae09233ca69031cede9deea9b1feb68ce64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 7700 bytes
font_03_sfnt_off00010818.bin
8c52fe4c46530205ab9d886128e28f044af64d2d540cb14adc08031ded7c7cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 15832 bytes
font_04_sfnt_off00013795.bin
7f37e6eda17307742c670a1792dd907bfd867e006b63feb2c1ad9cf539763025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13795 17820 bytes

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