Malicious PDF — malware analysis report

Static analysis result for SHA-256 5beb1e11f2084c85…

MALICIOUS

PDF

61.9 KB Created: 2020-12-20 05:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 84badc7fdd1ed3bbf2fa9ee500ab00b6 SHA-1: 13e7837e756dc37d3ffc125be8dd59d4557f3b45 SHA-256: 5beb1e11f2084c85ad81c4c18cf1d5ffa03de034a0960696de58b257f43246bb
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a string that appears to be a lure related to 'Highschool dxd hero season 4 episode 10', suggesting a phishing or scam attempt. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO manipulation and distributing malicious content.

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://traffking.ru/123?utm_term=highschool+dxd+hero+season+4+episode+10 In PDF document text
    • https://zumofimuletoxol.weebly.com/uploads/1/3/4/0/134018509/kipetoladonaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481520/normal_5fd2a6f3ec5a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_5fb684b5185f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5f9346da44d3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5fc901855ecd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409405/normal_5fd9ca6f960aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f91023812933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8738fd0bb9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f94314271bcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_5fce68feefae9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d900bba-1d8e-492a-a36d-af9aa2015a88/rimabozolo.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/alolan_marowak_raid_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbcf995e-5810-4157-acfb-b455f1f6b738/expression_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/abacus_software_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/aspen_hysys_7._3_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/27085753239.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/wapafibosamukidapenumut.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_off0000b314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB314 5644 bytes
SHA-256: 8cc0189ef803759361f59174370fbe4e2e01970d2bbebdebab174ef9577afc0f
font_01_sfnt_off0000c656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC656 10072 bytes
SHA-256: eb9ed3888dfe8f0ee334fdfca8f405b6d21791d567ceb455d8cf56211109a45d

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