Malicious PDF — malware analysis report

Static analysis result for SHA-256 049586705d9fb953…

MALICIOUS

PDF

85.4 KB Created: 2021-05-24 06:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2ee2b62117e18acbd3cf65781e936d13 SHA-1: fd148c62887911d02ce36aeaf2df4ca1b85250cf SHA-256: 049586705d9fb953e3e859bfe789e2ee3ea82962ff2782e5c471401611574901
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO farms or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ponafet.ru/strik?utm_term=what+are+the+types+of+figure+of+speech+with+examples PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475999/normal_5fc87290d7661.pdfIn PDF document text
    • https://rebavunegiluzu.weebly.com/uploads/1/3/4/4/134497465/8549007.pdfIn PDF document text
    • https://malabukepi.weebly.com/uploads/1/3/0/9/130969546/rerusupi_nekomul_wizuwufoneloxat_zojemobakix.pdfIn PDF document text
    • https://wuguruxozoza.weebly.com/uploads/1/3/4/0/134040539/2155294.pdfIn PDF document text
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/mawuwunadole.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/dosinalararele-sizumadini-malirepuvegenu.pdfIn PDF document text
    • https://sotumeramevoma.weebly.com/uploads/1/3/0/9/130969712/814d945e8.pdfIn PDF document text
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/e50b2e2b3d0fd.pdfIn PDF document text
    • https://sarajigirokoxi.weebly.com/uploads/1/3/5/3/135300612/a3b9983fa92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_5fd632916830c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489975/normal_606ea9d147b34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_603983c15b9e3.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/3d9f2bc8-684e-48b6-8fdf-250e7a9f44a9/what_are_the_benefits_of_universal_design.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/memeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a23daacc-b40d-4be3-b3ae-a51c001a3a45/39623532843.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/discounted_cash_flow_valuation_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/braiding_machine_design.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/ieee_research_paper_latex_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a5da3b-27de-4378-a65c-1ce6bace5cf6/everstart_plus_smart_charger_fault_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc73623-0ffb-4eae-bae6-0d6a1cde1648/why_students_dont_like_school_uniforms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecbf09f7-cd3d-4e8f-ab90-68ccbb7fd6f2/29223462577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde6350f-21e6-48f5-9c78-51156df0ab34/misefegifus.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/40357473783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fd7c789-6ad7-4dba-8a47-a920ecc3464f/85714698197.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_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 5704 bytes
SHA-256: 3837d110feae0e97ab71c7b253f45d9658f5e565e7a90b2b70a5165317eeebb0
font_01_sfnt_off000121a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A1 11340 bytes
SHA-256: f44ac0ecc4e69f6ad93271d5b4b20acbf5f90b124eacff5c935af6b417da4333